x SMB pads were way too big!
x crystal oscillator needs a bigger footprint
x big transient supression diode is too close to filter.
x filter is really close to PLB connector
x PLB footprint may be a little off-check it
x change cap values for stepper caps.
x fix rc filters
x put minus signs on tant caps
x change 3.3 uF caps to 3.3nF
x fix hole spacing for mounting holes
x try to make the spacing of the traces further apart
x put a bias resistor on the pots for the steppers
x use 10 pin connector
x use a digital out and "and" it with the reverse signal
     --turns out you need 4 NAND gates to do it right
     --PWMout =     PWMin & (~DIR + LIMIT2)
     --PWMout = ~(~(PWMin & ~(DIR & ~LIMIT2)))
     --pull LIMIT2 down to GND with 10K resistor