well if you dont tell them they probably wont check it. but thats bad GP
. so to get rid of frame voltage...
*check all MOTORS. all connectios where wires touch motors. unplug the motor and see if it is going thrugh the winding or watever. if it is, thats a BIG problem.
*electronics board. last yeah i build my own "ground stud". all of the electronics were on lexan, but we had a huge frame-grounding problem. it turns out that the screws that held the standofs that held the groundstud were touching a structal member.
*check wires. sometimes wire can get pinched and short with the frame. bad striping jobs, exsessive heat... etc
*sensor circutry. as well as custom circutry. make sure it FAR away from the frame. be libral with your electrical tape use!
*and finaly, the battery. one year our battery holder was made out of aluminum. must i go farther?