Well, since I'm not throwing chips quite yet, I figured I'd post a little bit about the upgrades here. The long and short of it is pretty simple, I'm revamping an old CNC Spectralight machine with the TinyG. The idea being rather simple: Update the CNC control electronics while making allowances for manual override, spindle control, and safety. So here's some pictures:
The original motion control board from the Spectralight case
Built an adapter to mount a CPU fan to the underside of the TinyG using 1/4" plexiglass (conveniently provided by the protective plexiglass on the spectralight case)
TinyG and spindle motor driver board mounted into old case
Power supply mounted and USB cable run