[cwengineer]

I took a break from this robot, then swapped out the PWM cables, restarted the laptop, reloaded the code, tested again and it works beautifully now.
I don't think it was the cables and am still a little bugged by what was causing the problem, but at this point I'm glad it's working.

Is there a spec sheet on this shield to tell me which Arduino pins are being used for what? I want to know which pins are open to use for custom circuits.