I'm setting up a plane and want to get the most resolution out of my servos. So I set my arms up for a 1 to 1 ratio, but to get a good 45 degrees throw on my elevators I had to dial in travel to almost full (150) on the DX9

The problem is when I go into DR and expo and try to set a high rate (maybe about 50 degrees) the RIGHT elevator moves down to the 45 degrees and then stops. while it will move UP to the full 50 and hte left one will move up to 50.

What appears to have happened is the RIGHT elevator doesn't center on the gear as well. So I had to use subtrim to get it to center up. That in conjunction with the travel makes it bottom out on the monitor when moving DOWN but not up.

My quesiton is, these servos (if moved manually) can move MUCH further than what the radio is requesting. They can move 180 degrees. but the radio is only allowing a max of about maybe 120. Is there a way to get the radio to allow more range of the servo?

Maybe a better question is - is there a great source/web page for basic servo /radio set up to help me understand all this better?
thanks!