Hi overcool,
I love the idea of your OS but I'm going nuts trying to create a bootable USB. I'm currently running in a windows 10 environment (both on my miner and my regular pc).
I have tried many USB tools including: USB Image Tool, PowerISO,  Multiboot usb and XBoot.
After 20-30 minutes sometimes I get "invalid disk - need to format F:" or no error but boot menu just never sees it.
I tried converting your /img file to a .iso, but still no good. I'm at a loss of what to do!
I'm a bit of a nood with Linux and Ubuntu, but have been programming for over 40 years, on many platforms and languages, so not a noob in many areas.

Update: 2 hours later...
I now have a USB which will boot, installed Syslinux via MultiUSB then added XMOS v2 .iso (iso was made from your .img file with SuperIso).
I now see the boot option for XMOS V2 but then screen goes black... Ctrl Alt F1 does nothing.  Ctlr A 1 does nothing...
When Miner Rig boots under windows it's IP is 192.168.1.4 and when booted under XMOS router does not show 192.168.1.4, nor any new IP, so I assume the boot has failed...

:{
John.