Securing Your Seed Phrase with Washers

[n0nce]

After reading this thread, I came up with the idea to simplify jig. Undoubtedly, n0nce's Steel Washer Backup jig is convenient and useful, but there may be cases when there is no time to search or create jig. In this case, my downgrade (because the design is simplified as much as possible) can perform its function as a template for stuffing letters just as well.

Wow, good job! I really like this idea.

If there are difficulties with fixing the position of the stamp on the template, then you can use several layers of a large circle (gluing them) and / or using thicker cardboard (thin is easier to cut into shape).

I was about to say: One layer will be suboptimal, because (you'll notice this when you try with real stamps), you tend not to hold the letter perfectly straight without a jig, resulting in letters being deeper at the top than at the bottom for instance.
I've got an example picture here, and it's even harder with larger letters:

However, if you were to cut out like 10 of those disks and glue them together, it might hold the stamp straight enough (or help you hold it straight, since the cardboard would be easier to bend by hammering than bending the plastic).

In general it has to be tried out if there are any forces that apply to the jig which can't be taken up by cardboard, but if alignment is enough, it should work well, honestly!

You can make a similar stencil on a 3D printer with variations to your choice.

Another option that is cheap and quick to manufacture (if you have the tool) is laser-cutting. Multiple layers of plywood glued together should work really well. And would give the lateral stability that I don't yet fully trust in when using cardboard.

P.S. Sellers are surprised by the sudden demand and hype for washers. They say they are expected to be in short supply.

I'm already heavily invested in the washer market! All these posts I'm writing are pure market manipulation.

The main difference I believe, is that re-stamping is hard without notches. I had to do it since my material was quite hard, the table I used was quite soft (absorbed a lot of the impact), and my letters are pretty large - so imprints weren't always deep enough for my taste.

So out of the 3 benefits of my jig, with more cardboard disks this should check all boxes but one (3):
1) Equal letter spacing (looks nicer)
2) Holding the stamp straight, giving a uniform letter (readability)
3) 'Re-stampability' (readability)

[LoyceV]

~ cheap ~ to manufacture ~ is laser-cutting.

I can think of great ways to store seed phrases in steel plates with laser cutting, but I wouldn't assume it's cheap.
Example:

(source)

I could also think of a very nice storage design if you happen to have a CNC cutting machine. But even if you have access to very cool hardware, it brings the problem of wiping it's memory. That makes a pen or letter punch is much safer by default.

[n0nce]

I can think of great ways to store seed phrases in steel plates with laser cutting, but I wouldn't assume it's cheap.

Sorry, I meant creating the tool with a laser cutter. A small 30W laser cutter should be available for around $200, so it might even be cheaper than buying a 3D printer. But of course you can only do plywood cutting and cardboard with those weak diode lasers. In a pinch though, it would allow you to make a few disks and glue them together. In fact, even the original 'full stamp' design should be laser-cuttable in multiple layers with minor modifications.

As you mentioned, this would still circumvent the issue of not wanting to have the seed phrase in any sort of encoding on any sort of electronic device.

[m2017]

After reading this thread, I came up with the idea to simplify jig. Undoubtedly, n0nce's Steel Washer Backup jig is convenient and useful, but there may be cases when there is no time to search or create jig. In this case, my downgrade (because the design is simplified as much as possible) can perform its function as a template for stuffing letters just as well.

Wow, good job! I really like this idea.

Of course, you can't help but like this idea, since it's basically your idea. I just simplified it and slightly changed it, making it accessible even to a schoolboy.

If there are difficulties with fixing the position of the stamp on the template, then you can use several layers of a large circle (gluing them) and / or using thicker cardboard (thin is easier to cut into shape).

I was about to say: One layer will be suboptimal, because (you'll notice this when you try with real stamps), you tend not to hold the letter perfectly straight without a jig, resulting in letters being deeper at the top than at the bottom for instance.
I've got an example picture here, and it's even harder with larger letters:

However, if you were to cut out like 10 of those disks and glue them together, it might hold the stamp straight enough (or help you hold it straight, since the cardboard would be easier to bend by hammering than bending the plastic).

Yes, I assumed that the layer in my case is too thin and in real use with a stamp, a thicker thickness is needed. This is a kind of prototype, which aims to show the general concept and requires further development for practical use.

Yes, in my case there are few sheets of cardboard. More is needed to better fix the stamp.  I think the optimal thickness will be ~ 5-10 mm.

You can make a similar stencil on a 3D printer with variations to your choice.

Another option that is cheap and quick to manufacture (if you have the tool) is laser-cutting. Multiple layers of plywood glued together should work really well. And would give the lateral stability that I don't yet fully trust in when using cardboard.

Oh yeah, laser. How did it not occur to me. Can even cut a template out of plywood and it will be durable and regular in shape.

P.S. Sellers are surprised by the sudden demand and hype for washers. They say they are expected to be in short supply.

I'm already heavily invested in the washer market! All these posts I'm writing are pure market manipulation.

Well, I didn't assume otherwise and was sure that there was a vested interest here.

The main difference I believe, is that re-stamping is hard without notches. I had to do it since my material was quite hard, the table I used was quite soft (absorbed a lot of the impact), and my letters are pretty large - so imprints weren't always deep enough for my taste.

How about using washers from another metal? Softer, for example, aluminum. This metal is not subject to corrosion due to the oxide film, which is quite resistant to weathering. The melting point is also not very low. But the main advantage is ease and pliability in processing.

~ cheap ~ to manufacture ~ is laser-cutting.

I can think of great ways to store seed phrases in steel plates with laser cutting, but I wouldn't assume it's cheap.

You misunderstood. A laser can be used to make a template. For example, from plywood, something like here.

The perfect place to store seed-phrase, right? Ok, at least cute for sure.

Wood will be stronger than cardboard and hold its shape well, almost like plastic. Also, the laser burns out the edges of the plywood, which strengthens the wood in these places. So, I think the strength is quite high (in theory).

Can order along with the details for the template and other elements, so as not to raise questions, why do you need this product. Lose them among other elements. Something like bitcoin-mixer. No one will guess why you need a few circles in a common pile of details. And already at home you can glue them (as in my post with cardboard) or fasten them with bolts (or other ways ) and apply them to your needs.

I can think of great ways to store seed phrases in steel plates with laser cutting, but I wouldn't assume it's cheap.

Sorry, I meant creating the tool with a laser cutter. A small 30W laser cutter should be available for around $200, so it might even be cheaper than buying a 3D printer. But of course you can only do plywood cutting and cardboard with those weak diode lasers. In a pinch though, it would allow you to make a few disks and glue them together. In fact, even the original 'full stamp' design should be laser-cuttable in multiple layers with minor modifications.

As you mentioned, this would still circumvent the issue of not wanting to have the seed phrase in any sort of encoding on any sort of electronic device.

While I was writing the answer to LoyceV, you already outstripped me with an explanation.

The laser can't cut plastic from a piece, can't it? And how about engraving washers with this laser? Engraving depth not enough?

[n0nce]

Oh yeah, laser. How did it not occur to me. Can even cut a template out of plywood and it will be durable and regular in shape.

I would still do a few and glue them together though, to keep the stamp from wobbling around.

How about using washers from another metal? Softer, for example, aluminum.

Yeah, on one hand steel backups are way more popular since it's less easy to bend e.g. if a house were to burn down and it's crushed. On the other hand, those are usually single sheets of steel, while this method gives you a compact, solid cylinder of metal that should be a lot harder to bend, even if the material itself was as soft as aluminium.
Only other reason against it could be price, but it does sound like a good substitute for a better result and less corrosion risk!

Can order along with the details for the template and other elements, so as not to raise questions, why do you need this product. Lose them among other elements.

I like this idea. You really think outside the box. Make the circle part of some other design (such as the box you've shown) and trash the rest once you receive it. Nice!

The laser can't cut plastic from a piece, can't it? And how about engraving washers with this laser? Engraving depth not enough?

It cannot, it would melt! Though if you have a CO2 laser, you can cut certain types of acrylic sheets. Engraving metal also requires one of the more expensive CO2-based laser cutters.

[LoyceV]

Sorry, I meant creating the tool with a laser cutter. A small 30W laser cutter should be available for around $200, so it might even be cheaper than buying a 3D printer. But of course you can only do plywood cutting and cardboard with those weak diode lasers.

But why? Why would you use a laser cutter for plywood, and not a drill, chisel or jigsaw? What happened to old-fashioned DIY woodworking?

How about using washers from another metal? Softer, for example, aluminum. This metal is not subject to corrosion due to the oxide film, which is quite resistant to weathering. The melting point is also not very low. But the main advantage is ease and pliability in processing.

Or both: one steel and one aluminum backup, so you get the benefits from both materials while mitigating the drawbacks.

[dkbit98]

...

Interesting little project, but this looks like a cheap alternative that is more time consuming to make, and it's inferior to engraving procedure in many ways, and using glue and markers means that it can easily be removed with some liquids.

How about using washers from another metal? Softer, for example, aluminum. This metal is not subject to corrosion due to the oxide film, which is quite resistant to weathering. The melting point is also not very low. But the main advantage is ease and pliability in processing.

This is terrible idea!
Never use aluminum in any way for storing seed words... you can see Jameson Lopp test with some metal backups made partially from this metal.
It can be distorted much easier and it melt's on much lower temperature than stainless steel or copper, especially if it's some cheap alloy it can be even lower.
Someone said that you can easily avoid corrosion for stainless steel with industrial fat or even with paint, if you worry about that (I wouldn't if stored properly).
For comparison, it can have almost three times lower melting point compared to cheap washers made from stainless steel:

Aluminum 1220 F or 660 C
Aluminum Alloys 865-1240 F  or 463-671 C
Copper 1983 F  or 1084 C
Stainless Steel  2750 F  or 1510 C

Few days ago I saw in my local shop they are selling cheap engraving tool that works on Li-ion batteries and it comes with several templates made from letters, numbers and shapes.
This can easily be used to make custom metal backup for bitcoin, but templates and tip is bigger than washers, so I would need to buy bigger washers, or use metal plates.
Engraving tool I saw works on all surfaces like wood, plastic, stone and metal, nut I am not sure how it will work on stainless steel yet.
Here is one video of one similar tool:
https://www.youtube.com/watch?v=5_tq8ixXmLM

[m2017]

Oh yeah, laser. How did it not occur to me. Can even cut a template out of plywood and it will be durable and regular in shape.

I would still do a few and glue them together though, to keep the stamp from wobbling around.

Most likely, yes, it will be better that way. Need to test this and choose the most optimal solution.

How about using washers from another metal? Softer, for example, aluminum.

Yeah, on one hand steel backups are way more popular since it's less easy to bend e.g. if a house were to burn down and it's crushed. On the other hand, those are usually single sheets of steel, while this method gives you a compact, solid cylinder of metal that should be a lot harder to bend, even if the material itself was as soft as aluminium.
Only other reason against it could be price, but it does sound like a good substitute for a better result and less corrosion risk!

Together with the outer capsule, the strength should be acceptable. Also, you can use a capsule made of a more durable material (steel or stainless steel).

Can order along with the details for the template and other elements, so as not to raise questions, why do you need this product. Lose them among other elements.

I like this idea. You really think outside the box. Make the circle part of some other design (such as the box you've shown) and trash the rest once you receive it. Nice!

This is not just a box, but a safe with a combination lock for storing your washers capsule or paper seed-phrase (no one is responsible for safety).  

Can add a few elements you need to such a drawing and give it to any company on order (to cut parts with a laser), even if you have it across the road. No one will guess about the extra elements, unless of course they read this topic.

...

Interesting little project, but this looks like a cheap alternative that is more time consuming to make, and it's inferior to engraving procedure in many ways, ...

Yes, that's right, it was conceived as a cheap alternative that is simple and quick to make. It will not take so much time to make: draw a shape, cut it out of cardboard, glue it - that's all.

...and using glue and markers means that it can easily be removed with some liquids.

Oh no, no. You didn't quite understand my idea. I used a marker (for clarity) only because I don't have stamps (I wrote about this above). According to my idea, stamps should be used instead of a marker, as in n0nce's project.

How about using washers from another metal? Softer, for example, aluminum. This metal is not subject to corrosion due to the oxide film, which is quite resistant to weathering. The melting point is also not very low. But the main advantage is ease and pliability in processing.

This is terrible idea!
Never use aluminum in any way for storing seed words... you can see Jameson Lopp test with some metal backups made partially from this metal.
It can be distorted much easier and it melt's on much lower temperature than stainless steel or copper, especially if it's some cheap alloy it can be even lower.
Someone said that you can easily avoid corrosion for stainless steel with industrial fat or even with paint, if you worry about that (I wouldn't if stored properly).
For comparison, it can have almost three times lower melting point compared to cheap washers made from stainless steel:

Aluminum 1220 F or 660 C
Aluminum Alloys 865-1240 F  or 463-671 C
Copper 1983 F  or 1084 C
Stainless Steel  2750 F  or 1510 C

Ok. If Jameson is against aluminum , then can replace it with any metal, be it copper, stainless steel, brass - which has high corrosion resistance, high melting point and strength. The catch may be that it will not be easy to find washers made of any metal.

My alternative to washers: cut out a polygon from a sheet of metal (metal and thickness of your choice).  For example, a hexagon (I assume that a hexagon will be quite enough). The number of polygons will depend on the degree of your laziness, because you have to cut it yourself.   Then drill a hole in the center. You will get a low-poly analogue of a washer. Using a hand-held power tool (drill, dremel), there should be no problems with making. I hope LoyceV will approve my proposal with an idea old-fashioned DIY woodworking metall.  

Form example. Just need to add a round hole in the center.

Advantages: The ability to customize for any size of the "washer", holes (can choose a bolt with a smaller diameter), and most importantly, ample opportunities with the choice of metal (can even make it from gold ).

Disadvantages: The need for power tools and the skills to use them. You can compensate for all this by "outsourcing" the production.

Few days ago I saw in my local shop they are selling cheap engraving tool that works on Li-ion batteries and it comes with several templates made from letters, numbers and shapes.

Using an engraver is also an effective idea. Then don't need a jig at all (instead of stamps), but you can use my little project as a stencil for drawing letters evenly. First, you can draw the letters with a marker (do exactly the same as in my 1st post in this thread), and then just go over the inscription with an engraver.

This can easily be used to make custom metal backup for bitcoin, but templates and tip is bigger than washers, so I would need to buy bigger washers, or use metal plates.

You can make your own template out of cardboard or plywood with the right size for pucks, for example. Also, look at well-known chinese stores, where you can find smaller tips.

Engraving tool I saw works on all surfaces like wood, plastic, stone and metal, nut I am not sure how it will work on stainless steel yet.
Here is one video of one similar tool:
https://www.youtube.com/watch?v=5_tq8ixXmLM

I'm sure it will work the same way. After all, that's what he was made for.

[dkbit98]

Ok. If Jameson is against aluminum , then can replace it with any metal, be it copper, stainless steel, brass - which has high corrosion resistance, high melting point and strength. The catch may be that it will not be easy to find washers made of any metal.

I don't know what you mean exactly...because most washers are made from stainless steel and it has even better corrosion resistance than aluminum.
Aluminum in normal conditions have good corrosion resistance and will not rust, but if any acidic or base liquid is added it corrodes rapidly resulting in catastrophic failure.
This means that stainless steel is almost perfect for seed storage, and only other metal that would be better is titanium, that is much more expensive.

My alternative to washers: cut out a polygon from a sheet of metal (metal and thickness of your choice).  For example, a hexagon (I assume that a hexagon will be quite enough). The number of polygons will depend on the degree of your laziness, because you have to cut it yourself.   Then drill a hole in the center. You will get a low-poly analogue of a washer. Using a hand-held power tool (drill, dremel), there should be no problems with making. I hope LoyceV will approve my proposal with an idea old-fashioned DIY woodworking metall.

This is just to much complicated for average human being, cutting metal is not very easy to do especially stainless steel, and will most likely result is cutting accidents and spilled blood, if not done correctly.
I am saying don't invent warm water all over again, just use washers or plates and don't overthink it.

[LoyceV]

My alternative to washers: cut out a polygon from a sheet of metal (metal and thickness of your choice).  For example, a hexagon (I assume that a hexagon will be quite enough). The number of polygons will depend on the degree of your laziness, because you have to cut it yourself.   Then drill a hole in the center. You will get a low-poly analogue of a washer. Using a hand-held power tool (drill, dremel), there should be no problems with making. I hope LoyceV will approve my proposal with an idea old-fashioned DIY woodworking metall.

Why a hexagon, and not just squares? Even easier: don't cut at all, just take some sheet metal, and start hammering:
01 ABANDON
02 ABILITY
.......
24 ABLE
Then fold the metal, and store it. No need to drill and use a bolt.

cutting metal is not very easy to do especially stainless steel, and will most likely result is cutting accidents and spilled blood, if not done correctly.

Cutting it is easy, making it look good is the difficult part

[dkbit98]

Cutting it is easy, making it look good is the difficult part

Did you actually ever tried cutting stainless steel metal?
I did cut various metals before in my life but it was never stainless steel  so I can't really say more about it.
Most people would create very sharp edges that are begging for blood from fingers, and I have seen people cut themselves many times even on paper
You would need to have proper tools depending on how thick metal is, and it's not good if metal is to thin.
Video showing cutting of stainless steel sheet metal with angle grinder:
https://www.youtube.com/watch?v=QO7sX9MixV0

[LoyceV]

Did you actually ever tried cutting stainless steel metal?

Of course And indeed with a 1 mm INOX cutting disk (as mentioned in your video). It cuts through steel like a warm knife through butter.

Most people would create very sharp edges

Cleaning the edges is indeed more work than the actual cutting.

begging for blood from fingers

The real danger is when a cutting disk breaks and spreads high velocity fragments:

(source)

[m2017]

Ok. If Jameson is against aluminum , then can replace it with any metal, be it copper, stainless steel, brass - which has high corrosion resistance, high melting point and strength. The catch may be that it will not be easy to find washers made of any metal.

I don't know what you mean exactly...because most washers are made from stainless steel and it has even better corrosion resistance than aluminum.

I don't dispute the superiority of stainless steel over aluminum in terms of corrosion resistance and strength, but stainless steel is less machinable (although this is affected by the thickness of the metal). For example, stamping on aluminum is easier and the depth of the letters will be deeper, and hence the legibility of the text. That's the reason why I suggested aluminum.

Aluminum in normal conditions have good corrosion resistance and will not rust, but if any acidic or base liquid is added it corrodes rapidly resulting in catastrophic failure.
This means that stainless steel is almost perfect for seed storage, and only other metal that would be better is titanium, that is much more expensive.

Each metal has its own characteristics. Based on this, everyone can choose with the characteristics necessary for him and under his own specific conditions. For additional protection, can paint after all, right.

It seems that someone has already mentioned this, but why not use several variants of storage from different metals? That is, duplicate text on 2 or more types of metal.

My alternative to washers: cut out a polygon from a sheet of metal (metal and thickness of your choice).  For example, a hexagon (I assume that a hexagon will be quite enough). The number of polygons will depend on the degree of your laziness, because you have to cut it yourself.   Then drill a hole in the center. You will get a low-poly analogue of a washer. Using a hand-held power tool (drill, dremel), there should be no problems with making. I hope LoyceV will approve my proposal with an idea old-fashioned DIY woodworking metall.

This is just to much complicated for average human being, cutting metal is not very easy to do especially stainless steel, and will most likely result is cutting accidents and spilled blood, if not done correctly.
I am saying don't invent warm water all over again, just use washers or plates and don't overthink it.

Washers are good - no doubt. There is no universal solution, and therefore, which of the methods to use, we will leave it to everyone to decide personally. Below is the text why I still tried to invent warm water.

My alternative to washers: cut out a polygon from a sheet of metal (metal and thickness of your choice).  For example, a hexagon (I assume that a hexagon will be quite enough). The number of polygons will depend on the degree of your laziness, because you have to cut it yourself.  Then drill a hole in the center. You will get a low-poly analogue of a washer. Using a hand-held power tool (drill, dremel), there should be no problems with making. I hope LoyceV will approve my proposal with an idea old-fashioned DIY woodworking metall.

Why a hexagon, and not just squares? Even easier: don't cut at all, just take some sheet metal, and start hammering:
01 ABANDON
02 ABILITY
.......
24 ABLE
Then fold the metal, and store it. No need to drill and use a bolt.

The hexagon (or other polygon) was chosen because this shape is more like a circle and will fit in the cylindrical capsule suggested by n0nce. After all, we are still discussing in the topic where washers + capsule are used for storage.

You can also make a square shape, but then need a square-shaped capsule or other case. This is the case if you cut plates. It will have to be stored in something or fastened together so as not to get lost.

In principle, the hole in the center can be abandoned if the hexagons are still stored in the capsule. Just need to fix them tightly inside. For example, pour or compact something. Of course, so that later you can extract.

As a reminder, the hexagon was chosen to expand the range of metals (and not be limited to stainless steel or aluminum washers) that can be used to store seed-phrase.

The option with a sheet of metal is also good, but in this case the surface area will be larger (folding the metal foxes like a sheet of paper will not work). I like the capsule puck idea because it makes the storage compact.

cutting metal is not very easy to do especially stainless steel, and will most likely result is cutting accidents and spilled blood, if not done correctly.

Cutting it is easy, making it look good is the difficult part

This is not a competition for the most beautiful seed storage, but a way to save important information. The main function is safety and readability, and everything else is secondary. Imho.

I hope I was able to explain the reasons for my proposed ideas.

To avoid injury,can use the services of those who know how to process metal. It is unlikely that anyone will be surprised to cut out hexagons or squares from a sheet of metal. When asked what it is for, it can always be explained by the creation of components for a hobby.

[n0nce]

My alternative to washers: cut out a polygon from a sheet of metal (metal and thickness of your choice).  For example, a hexagon (I assume that a hexagon will be quite enough). The number of polygons will depend on the degree of your laziness, because you have to cut it yourself.  Then drill a hole in the center. You will get a low-poly analogue of a washer. Using a hand-held power tool (drill, dremel), there should be no problems with making. I hope LoyceV will approve my proposal with an idea old-fashioned DIY woodworking metall.

Why though? It just takes much longer, needs a lot higher-end tools and provides zero benefits. Washers are already super inconspicuous to buy, readily available, they exist in any size and the jig can also adapted to any size of washer with my code. I don't see anyone doing this honestly.
Washers also do exist in enough types of materials. From the top of my head: aluminium, steel, stainless steel. Stainless steel is fine enough to stamp; what I said before was mostly a side note (about sometimes not stamping deep enough).

The advantage of washers over sheet metal is that it should be easier and cheaper to get and with the jig it gives you a quick and nice result. It's also more compact and I'd argue it should be easier to find in rubble.

[fillippone]

Guys, the whole point of the experiment is grasping the beauty of the simplicity of the design.
A few washers, a nut and a bolt. That's it.
Maybe a fancy aluminum container, just because.
Stop it.

Tamper seals and everything is not necessary.
Do not overcomplicate things.

Less is more.

[fillippone]

As I said in OP, the method used to secure your own phrase should be carefully selected.
On this topic, a. very interesting read by Jameson Lopp:

How to Back Up a Seed Phrase

There's no shortage of guides published regarding how to back up a seed phrase, so why am I writing this one? Most guides I've seen are prescriptive. They tell you to do X, Y, and Z and call it a day. My goal is to be more descriptive about the thought process you should follow when planning your seed backup architecture. If you aren't thinking about your threat model, you may follow a prescriptive guide to your own detriment and end up with a false sense of security.

[dkbit98]

As I said in OP, the method used to secure your own phrase should be carefully selected.
On this topic, a. very interesting read by Jameson Lopp:

How to Back Up a Seed Phrase

Mamma mia!
I have to say Jameson Lopp always have some new interesting articles and materials for reading.
Most important thing for using any solution for backing up your seed phrase is to Test Your Backup.

On topic of Seed Words backup I am posting one VIDEO Comparison of Best Metal Seed Phrase Storage solutions based on Jameson Lopp testing.
This guy even made nice spreadsheet with most currently available devices, so you can consider it addition to original work made by Jameson Lopp.

I also saw one more stainless seed plate made by our forum member willi9974, and I think he is sending that plate for new round of Lopp testing.

[n0nce]

If anyone in the United Kingdom wants to buy a Blockmit jig (though I believe mine is better due to the ability to customize it! ) I just found out this 13 year old kid runs a 3D printing Bitcoin shop over there and has the jig in stock for £5.00 which is a pretty solid price in my opinion.

https://robotechy.com/


I'm sure you could also send him a customized STL file of my jig and he'd print it for a similar price.
Not affiliated, just giving a shout out to a young entrepreneur!^{(I'm sure there are parents in the background to help him, but still I support it when children do something useful with their time)}

[dkbit98]

If anyone in the United Kingdom wants to buy a Blockmit jig (though I believe mine is better due to the ability to customize it! ) I just found out this 13 year old kid runs a 3D printing Bitcoin shop over there and has the jig in stock for £5.00 which is a pretty solid price in my opinion.

Wow... I have to say that I am impressed with this kid!
He is 13 years old and he already have his own website, and he is selling 3d printed stuff, SeedSigner, Raspberyy Pi Zero (in stock!) and he is accepting both Bitcoin and Lightning payments!
Even if you don't live in United Kingdom you can order from that website if you live anywhere in Europe or anywhere lese in the world.
He is learning programing languages for Bitcoin, and one more interesting thing is that his sister (sheis seven years old btw), want's to start her own Bitcoin only store, according to one of his tweets @IsaacWeeks  

[m2017]

Yesterday I wrote in topic stainless seed plate and came to the conclusion that it should have been posted here. Which is exactly what I'm going to do now.

In my opinion, the option with pucks seems to me more interesting - Securing Your Seed Phrase with Washers. But with a slight correction (saw in your thread): put only the first 4 letters of each word on the washer, which will allow to fit 2 words at once (the first 4 letters of each) on 1 washer. This will reduce the number of washers to 12 (in the case of 24 words) and to 6 (in the case of 12 words). This is appropriate if you strive to reduce the object.

I decided to add visibility to my yesterday's idea and refine it a little, diluting it with my comments on this matter.

I took the already known washers (the most common metal ones, not inox), a couple of nuts and a threaded rod. You can vary set according to their availability in your toolbox or store.

The washers are 3mm thick (I'll come back to this later) and about 37mm in diameter.

In my case, the rounded side of the nuts fits perfectly into the hole of the washers, so I screwed them the other way around.

With this mini-experiment, I want to clearly show that 4 words can be applied to 1 washer. 2 on one side and 2 on the back. If reduce the number of letters to 4 (this is enough to identify the desired right word and restore seed-phrase). There is still space for numbering the puck so as not to make a mistake with the word order.

In the pictures, the front and back sides of the same washer.

In principle, if you use slightly larger washers, you can fit more symbols.

This is what it looks like assembled. As you can see, there are 12 washers here (Can accommodate 2 seed-phrases of 24 words each).

In order to place 24 words (the first 4 letters), 7 washers will be enough. On 5 washers , apply 4 words, and on 2 washers, only 2 words on one side for each (when assembling the storage, place these 2 washers on 2 sides, clean sides out). This will hide the image.

Also, nothing prevents you from combining 2-3-4 seed phrases into one construction, this will be 12-18-24 washers.

Now about my symbols in the pictures. These are arbitrary symbols to show their legibility, applied with a regular screwdriver (hard alloy is needed). As I said, the thickness of the washers is 3 mm, and this allows you to apply text on both sides. There are no dents or marks on the back side. This can be seen in the pictures above.

I would like to add that I don't invent what was invented by fillippone, but only slightly modernized in order to make the storage more compact.