I have this Forney based on a Bachmann 2-4-2 'Columbia', and I replaced the bad gear. Unfortunately, to do so you have to pry the pins out of the back wheels to release the rods. Guess what - one went "zing" and disappeared. On the pic you can see one good pin and one screw head! I'd like to find another pin, or a bad chassis that I could steal one from? Any offers?