Has anyone ever made molds of the gears out of their loco's. Just need to know the does and don'ts and what the best material to use is, And I would like to cast them in metal if possible. Can you get the stuff from local stores. I.E. HobbyLobby ETC. I finally recived my Connie gears from Bachmann I ordered 2-1/2 months ago, Three full sets and was thinking metal would be better. Any thoughts?