Just a tip. I was stripping spur gears acationally on my rusty when I put a 9l in it. You can replace the spur gear in the rusty with this 32 pitch gear and it makes it alot tougher.
http://www2.towerhobbies.com/cgi-bin...?&I=LXJJ11&P=0 It drops right in, its almost the exact same diameter as the stock 64 pitch gear. You will need 32P pinion gears though.
Dont know if you are having any problems, but you said you were going to regear and I thought Id mention it.