I sold a Chinese copy of the Grizzly GO462 to a friend a while back and have a question about the variable speed Reeves drive. When I first bought the lathe the digital readout showed it running at 700 rpm at the lowest speed (although the actual speed may have been lower). My friend says he now can't get it to run slower than 900 rpm, making it impossible to turn large bowl blanks because the lathe starts walking across the floor. Does anyone know of a way to fix the speed control to slow it down? Help appreciated.