Excuse my ignorance but what is OSE or RRR ? I am trying to find out what aqua craft 36-56 motor is legal for NAMBA use in 1/10th scale. In our club we do not use the namba spec motors , but with a namba event in the future I will need to run a motor that fits there rules. All the rule book states is a 36-56, but they make 3 different KV motor ratings.