I got a Great Planes turmoil flat out. I am using the stock motor whic I believe is th t370 brushed. I got a gws 4 pico receiver, fmadirect 20 amp esc. I have a Great plane 3 cell lipo rated a 640 mah. The motor shutoff well before reaching full throttle. I then have to turn off the switch off and back on again. I disabled the brake and low voltage on the ESC. Also fully charged the battery. One other problem is that the receiver has 4 channels. channel 4 is shared as 4/b. I have the battery attached to the ESC in channel 3 and the rudder in 4. The rudder will not work. I checked the servo in another channel and it works just not in 4. Is this because it is shared?

Thanks