Hi all, first post here, though I've lurked for quite a while now. I recently saved a handful of mics from the recycling bin, and need a wee bit of assistance with some of them. Before I begin, I should mention that I am a semi-professional electronics repair tech and I do a lot of work on amps, synths, and recording gear, but not a lot of microphones. First mic: Sennheiser MD421. I've already flattened out as many of the dents in the grille as I can. The mic seems to work fine - I have an XLR cable with alligator clips on one end, which gave me some good signal out of the connector at the bottom of the mic, but once I try and connect to the XLR connector (which I'm certain is not from the same model, as there were a few other smashed 421's in the bin) it buzzes and sounds terrible. The pins at the bottom of the mic correspond to XLR pinout, but the adapter is wired differently. - ground to pin 3. So I figured I'd re-wire the adapter. Easier said than done. Can't get the damn thing open! I managed to pop out the snap ring holding the XLR in, but there wasn't enough wire to pop it out. And I can't manage to unscrew the black metal ring from the rest (I assume the two slots are for unscrewing it...). Any suggestions?