Well I got a hammer drill to do some tap con screwing, worked great! for the first 30 screws... then I started to have speed issues... right now if I push the trigger in a tiny bit it should rotate slowly, but no, full speed! it never did this until recently... it use to be variable speed, but now it wont go anything but max... is it gone? or can I take it apart and clean it or anything? didn't really want to have to buy another one.... thanks!