I bought a "Husky Pro" right angle die grinder (Home Depot's line, made by Campbell Hausfeld) and either I got a bad tool or they are not designed very well. Kind of hard to explain, but there is a threaded plug of sorts at the base of the arbor that keeps coming un-threaded and I have to stop and thread it back in every so often. It's getting old and not sure why they designed it this way. I cannot get it to stay in for the life of me. I am going to exchange it and see if I got a lemon. Anyway, was curious what brands you guys have and how you like them just in case I have to go another route. Thanks!