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[kufman]

To get the same performance out of a lower Kv motor you need to have higher voltage. You are correct when you say that the higher turn motor has more resistance. So.... at a given voltage you can't get as much current to flow through a higher turn motor. V/R=I

There does seem to be a non-scientific "sweet spot" for a given motor geometry. For the MM maybe that spot is the winds used in the 5700. I know in the Lehner basic series, the sweet spot seemed to be with the 4200 version of the motor.