I set my motor voltage to 42v. I can take a pic but I may have to bring in my "real" camera for it to be any use to you. (Blackberry camera sucks, LOL). Confirmed that the pots are labeled M502. The steppers seem to be working just fine, although I don't have a physical load to put on them at the moment they seem strong enough to do the job. (At .8V Vref). Just to verify, I measure from the GND testpoint to the Vref testpoint. I'm at a loss..... it seems OK anyway but I don't like stuff going on that doesn't add up, LOL.