NEW Motor Controller coming

Quick followup, half a year later. I’m once again trying to spec out some small custom mobile robots for work (we’ll see if I actually get to build anything this time) and I’m thinking that a TRex would be a great as both the muscle and the low-level brains, with a little custom software. So my questions are:

-I think this was mentioned already somewhere, but which AVR is that running the TRex control board?

-Would you guys be willing to post a schematic of the TRex control board? Not polished, just one you might have lying around to see what is connected to what through what.

-Yes, I would like to use the incluced bootloader to download programs, and have the option of reverting back to the stock Pololu software, but will it handle AVR studio hex files with unusual line lengths, or would I need to watch out for those?

Thanks,

-Adam