You can take a fly apart with two or three common fly tying tools. Take a razor blade and cut the whip finish on the head. Use your fingers or a pair of tweezers and unwrap the tying thread. If you come to a half hitch, use a bodkin needle to untie the half hitch and continue uwrapping the tying thread. With a little practice it is possible to untie some patterns and retie them with the original material, minus a few turns of tying thread. SS