RE: computer radio
It comes easier with every set-up job you do. I've always found the least important function, the most fussy to do, and that is the throttle. I want a good solid idle, I want to be able to kill the engine with trim; or, a kill button if so equipped and I want the barrel full open at W.O.T. and not be stalling the servo.
With control surface throw, I just try to get them fairly close. Most designs now incorporate two aileron servos which is nice, as it allows you to use the computer radio to easily set-up functions like flaperons and differential.
If someone asked me for a radio recommendation when starting out, I would suggest buying a computer radio. I would also recommend 2.4Ghz as the 72Mhz stuff is pretty much valueless if you ever want to sell it, now. I tried to sell my Airtronics VG6000 with 3 matching recievers and had no takers at $75.00! My son had expressed an interest in the hobby, so I gave it to him. I guess I'll hold onto my RD6000, then.