[Rob. Smith]

What in the world are you cutting out ? I removed most of the stuff with a drill and a burr. All the rough smoothing was done with an angle grinder and a "Flap Disc" these discs come in several grits and last forever. I use a 60 grit for the rough stuff and a 80 to finish. With a little practice you can get a pretty good finish. I've "borrowed" dads USA 110v Dremel and haven't used it at all because it would take too long to do the job. any way whatever you use...patience is the key. a bit at a time will finish the job with a quality end !