The dual-mode lever and high-speed length controller boxes are matched to a specific motor model, thus using two different motor models is not possible with a single controller. 300C/300C-LR lever systems work with model 6350 motors, 305C-305C-LR lever systems work with model 6650-LR motors, 310C/310C-LR lever sustems work with model 6400 motors. 315C/D length controllers work with model 6215H motors and 322C/D length controllers work with model 6220H motors. However, two of the same motor model works with a matched controller box (i.e. Two 300C motors (6350) works with a single 300C lever system controller).