Toss the electric tail motor and get yourself the Belt-Drive kit, or the new shaft-driven (torque-tube kit). There is NO comparision between the WEAK & WIMPY [:'(] (ETM), and a DRIVEN tail rotor with true positive & negitive pitch !

Did the conversion over 2yrs ago on my AXE CP v1, and never looked at an Electric-tail again!

Also, your BL main motor is way more powerful than you really need, your headspeed must be somewhere around 2800 RPM's!

To figure out the headspeed in RPM's= (Motor Kv * Nominal battery voltage * 90% effiency * Motor Pinion tooth count)/Main gear count. EXAMPLE: 3700*11.1*.9*14/186= 2782 rpm's

Shadow