Cheap & effective way to cut a 4 3/4" hole in plywood. (120mm for you Euros)

[Nolo]

I need to cut a single 120mm hole in a 3/4" sheet of plywood.  I've thought about buying a hole saw, but that's about $20.  I also thought about going and picking up a cheap jigsaw, and trying to cut it that way, but that might be a little rough and still more $ than I want to spend for one hole.  

Bottom line: I don't want to spend $20 to cut one damn hole.  Any suggestions I haven't thought of?

[CoinDiver]

Borrow the right tool, or don't be picky about the quality of the hole or price of the tool.

Sorry man, but I don't think you'll find a better solution than borrowing the right tool. That's a big hole through fairly thick plywood.

[Nolo]

Borrow the right tool, or don't be picky about the quality of the hole or price of the tool.

Sorry man, but I don't think you'll find a better solution than borrowing the right tool. That's a big hole through fairly thick plywood.

You're right.  I was hoping there was something I was missing.  Oh well.  Don't have anyone to borrow it from.  Guess I'll have to bite the bullet. 

[Prelude]

Well, if you're willing to spend the time instead of money and appearance isn't too important, I suggest tracing your circle and then drilling a lot of 1/8th of an inch holes following your trace. When done knock out the wood, and possibly sand the hole clean if needed.

[Vod]

(120mm for you Euros)

What does this mean?

The entire world, except for the US, is on the metric system.

[Nolo]

(120mm for you Euros)

What does this mean?

The entire world, except for the US, is on the metric system.

I choose to only recognize the US and Europe.  For example, "what's a Canada?"