RE: Throttle trim hover advise
When I used the original CPP radio, I had found a habit that worked well for me.
I started by pushing the throttle trim as high up as I could, without the main motor moving at all. That was just below 50%. Then I used the stick to start the main motor and get going. This way I was relatively sure that if I had a hard landing, binding the head, I could just pull down the stick. Even though I had not 'turned off' the radio signal to the main motor, it didn't have enough current to try to turn against the bind.
I was very happy with this setup. And yes, it makes a big difference.
Then I bought a real radio (DX7). Haven't even looked at the original radio since. ;-)
Biker-74