Try not to use it to destruction, there has to be more old guys on here with lathes.....and unlike me some of them might have experience "hobbing" gears. A soft aluminum might not wear the other gear....or there are machineable grades of derlin and nylon. It IS reproduceable...not by me but. Surely some one can (also there are people that injection mold plastic at home now too.....and don't forget 3D printing......