As I said the CC/Neu on 4s was already difficult to control. The Neu 1515 is 1700kv I believe and on5s was even less controllable. I'm talking about motors powered to in the mid 30k rpms. Calculate the CCNeu and Neu motors I just mentioned to check rpms. That has been my experience and thepeople I know and seen with lower kv motors. You should read more carefully what the person wrot before saying they are wrong. I agree it is more efficient but from my experience too torquey since the same high voltage low kv setups run 15lb MTs.