8ee68c2d_RMS___Wichita_State_University__Answer
[Topic] General [Question] Can we use different base units comprised of more than one kit, but we would only be using one NXT. In other words, we want to just place the NXT controller onto the bases. [Answer] 
If you mean place the controller (RCX or NXT) in a different shell, for professional teams the answer is yes. Apprentice teams are limited to one kit. However, the controller must be same for all the missions (registered).
SHOCKER MINDSTORMS - Wichita State University
Answer