Which LRP Rotor
 

I'm currently running a LRP X12 8.5t with a standard rotor and the motor in my opinion provides too much torque for my Losi XXXCR. Can anybody suggest which rotor to go for? I have already tried changing the timing inserts on the standard rotor.

I understand I need a 12mm rotor, but which one? The 50632 or 50636 works team?