Well, the hv motors are 3100kv for the 6.5 and 4800kv? for the 4.5. I would think that the 6.5 or similar kv motor would be interesting to test, and see how it performs with the sidewinder compared to the velineon system. I have a feeling the cc/novak combo would be better, since novak makes a better motor than the feigao clone in the velineon system.