I figured I'd post this here incase someone knows of something I'm missing..I make custom locking RCA cords. When I wire them up, I use my machines as reference and I wire the polarity so that the DC motors spin in a clockwise direction (except the dan kubin which spins counterclockwise)..I just recently had a customer write to me and said that the cord works fine on all his machines except his bishop and stigma hyper. he says neither machine will work with my cord. At first i thought this might be a polarity issue, however, if I reverse the polarity on the cord, most machines will run counterclockwise. I've read on some posts that most DC motors are made to run clockwise and running them in reverse will shorten the lifespan of the motor..

Is there something I don't know about these 2 particular machines or is there something else I'm missing?