I have a 21mm Voigtlander Color-Skopar lens that I put an Leica M bayonet adapter on when I bought it. It went on very easily. I now want to remove the adapter and it is stuck fast and I can't budge it. I have tried everything that I can think of to unscrew it, with no success. My efforts have primarily consisted of holding the lens with various padded materials and twisting, with a liberal application of creative language, but nothing worked. I even asked my teenage son to help-I'm that desperate! I hope someone will have a great and easy solution to my problem before I have to get out the blow torch and pipe wrenches. Thanks everybody.