"but make sure your motor is not turning too many r.p.m's."

This does not cause heat. AMPS cause heat. Lower your amps by reducing the prop. By the way the GWS 12 X 6 pulls more amps then the APC slow flyer 12 X 6 and that pulls more amps than the APC electric 12 X 6.

I optimize my thrust per Amp by measuring the static thrust for a whole bunch of propellers, to see whitch one generates more thrust at an Amp rating it can handle. When you overprop, the Amps go way up, and you actually loose thrust as well.

I don't have that motor, so I can not tell you exactly the right prop to use.

Larry