[jayjay283]

You can do both I believe #1

single speed

http://www.rc-monster.com/proddetail...eed_Conversion

2 speed adaptor

http://www.rc-monster.com/proddetail...apter_5mm_bore

http://www.rc-monster.com/proddetail...speed_1st_gear
http://www.rc-monster.com/proddetail...speed_2nd_gear

and use Brians program to find the correct 2 speed mesh
http://www.scriptasylum.com/rc_speed/two_speed.html