Carl,

Sometimes Hobby Lobby sells parts for their planes without advertising it on their Web site. It would be worth calling them.

Also, Hobby Lobby does sell gearboxes for the Speed 680 (aka Speed 700) motor but the prices are higher than just buying a new complete replacement power system at Tower Hobbies.

[link=http://www.hobby-lobby.com/drives.htm]Hobby Lobby Speed 700 Gearboxes[/link]

[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXJCJ6&P=ML]Magister Power System at Tower Hobbies[/link]