I have an older Woodmaster drum sander that I would like to add the reversing switch to. I've sent an email to Woodmaster and I'm waiting for a reply. But maybe someone here can help. On my sander the feed and drum motors are powered separately (120v for the feed and 240v for the drum) but the current model says it's a 90v DC motor so it's not the same. I didn't see if the new ones have just one power cord or two like mine. Does anyone have the directions that came with the switch? A DC motor is very easy to switch directions where as only select AC motors are built with that possibility. Given that the motor can run from basically 0 to 20 fps mine could also be a DC motor, I just haven't found the nameplate on it.