John,
Here are the links, The Hacker instructions are for the comp motor but will work the same for the setup you have.
Just remember the set screws that hold the gearbox to the motor are through the front mounting screw holes.
let me know if you need anything else.

http://www.rcuniverse.com/forum/m_3474503/tm.htm
http://morten.laugesen.nu/HackerC50.pdf