Mine has those handy reverse instruction also. I wish they had a sticker for "Not knuckles until chuck jaws stop", no stitches so not that bad. Mine was making this bad sound like bearings going out. Turns out motor driven pulley had no set screw and motor shaft was straight so it was wobbling around. Had to drill/thread set screw in pulley. That is the sort of thing one endures with HF stuff.