I ran across a "new" gearbox today that might be useful for the Fisher Price motors. It looks like a 36:1 planetary designed to mate directly with the 550 can motors so it should be a snap to fit to the Fisher Price motors. It has a 1/2" keyed output shaft and looks pretty easy to mount as well. They are ~$94 each but I am wondering about the quality and reliability as compared to the Banebots.
Has anyone seen/used one of these?
http://www.partsforrobots.com/Produc...ha/piranha.htm
and
http://www.robotcombat.com/marketpla...anhamotor.html