I have been reading a few pages of this thread and to me..I think you would never be able to tell any differences in the resistance of the fet's(the # that were talking about with the mid to upper speed controlers)The bottom line with speed controlers is on the track performance,I just got one(from STLNLST..THANKS.. )GREAT speed controller,I rate it above the GTX, LRP Comp 2, GM V12, and the KO (the KO is a good speed controller)The speed controller I'm using is the Zero ex.It has the best punch for stock racing I have ever used.