The problem you run into with this is bending them. If they are soft enough to bend, they will probably be to soft to use for landing gear (bend back on every landing). Isn't there a flat stock gear that will bolt on there somehow? Heating the wire is probably ok, but that ends up removing the temper from music wire and making it either brittle or soft.

Jeech.. what a choice, eh? I've got the wire landing gear on my new Goldberg Protege, and they are real soft.. the nose gear won't take much abuse at all, and my landings are very smooth (usually.. )