RE: do you really need a computer radio????
Can't count how many times I did a fast Preflight, checked the travel of the elevator, waggled good so handlaunch toss & BAM into the dirt. Seems once again I looked at the waggle instead of verifying the UP is UP: I left it reversed from a different plane, so I pulled up just a bit, which dove the plane, so more back stick to correct and piledrive the plane from full down elevator... 0.7second flight from a reversed channel.
Got a TX with model memory, no problem with that since.