Brad,
To answer your other question, no, this doesn't seem to be a common problem. You are the first one to mention it either here or on the Yahoo group since I joined roughly a year ago. And it has never happened to me.
Robert D.
It only "happened to me" because it's been that way since I got it. Believe me, I've whacked on it a few times, built pullers, etc. but nothing works. Even considered boring it out in a morse taper fashion to get it "thin" and then whack on it some more. Hope the dry ice gets it done!