Hmmmm, are you sure the motor will fit? I just took the CD out of my buggy and the distance between the ends of the CVDs is 40mm, going by the specs on the website the motor is 55mm long. Do you plan to cut the shaft?
What drive cups are you using? I found these which look good
http://www.rc-monster.com/proddetail...RCM8mmdrivecup