I also had the same thing happen to the bolts that go from the front of the rollbar to the windshield (including the breaking of the extractor bit!), except in this case, it WAS a stainless steel hex bolt... I ended up leaving it in place and removing the rear of the windshield (which, by the way, requieres taking all of the top off, not just the front part of the targa hardtop, as well as removing the sound bar- which I am only keeping for the light, as I am not using those speakers) to drop it so that I could fix the wipers (only to have the wipers break again the first time I went to use them, so now I get to do that all over again!).