ok, so i'm desperately trying to convert my v3 over to a spektrum receiver.

I've actually converted everything including the gyro upgrade with mini ESC.
The one issue i'm having is the throttle. When I increase the collective the head spins then stops, then spins again, then stops, etc.
I'm pulling power off the original 3-n-1 controller. What's the deal here.

I do have another external ESC but was hoping to avoid it.

Ideas?