Hi Chris I saw your post on MYCNC as well. I use a 20 Amp Pro Peak power supply, this is a bench power supply for my Bantam BC6 charger. It runs at 13.5volts ,10 amps this is using a 6mm diameter cutter with a cut of 1mm in ali. motor does get warm but have inproved spindle bearings still using orginal motor, hope this helps. If anymore questions just ask.
Tony