I'm not sure if anyone has covered this, but there is a very important 1st step when programming all computer radios.

1. The first thing you should do is to perform a "Model Reset." At least, that's what it is called on JR radios. There is a similar function on Futaba radios. What this does is to clear out all the old programming and reset all the channels to neutral. Neglect to do this and you are courting disaster. You could have an old mix left in that will bite you later when you least expect it. Don't tell me it's a new radio and never been programmed. It may be one that was checked for functionality during assembly and could still have some type of programming left in.
2. Next, install the servos and put the control arms on. If they aren't exactly centered, 90 degrees to the servo, go to subtrim for that channel and center them.
3. Hook up controls and adjust mechanically as close as possible to where you want them.
4. Now go back and make minor subtrim adjustments for centering as necessary.
5. Adjust your end points and dual rates.