First - welcome aboard!
Very clever adaptation - and the pricing looks fair (but then again I am no wirehead! SO what do I know )
Your board is the interface between th eUSB and the other Driver boards -- Have I got that right?
What boards are you using from your board to the motors?
Will you also be offering built boards - or just bare board and PICs?
Does Profili2 output in GCode too? Or, just the dxf that you'll work into another CAM program maybe?
I'll keep your ""little shop"" bookmarked for later. And, I'll watch for your build thread.
Cheers - Jim