Computer radios are very helpfull, but not absolutely nessary, especially for fun fly type planes where you can get away with large control throws all the time. (takes a lot to stall them) just set the throws so you have just enough to be able to stall into a flat spin. It will be a very agressive plane, but it is fun that way.

Those computer radios offer somer great higher features like spoileron, dual rate, exponetial, they are wonderfull, well worth the investment. A big bonus is most of the computer radios can be set up for mutiple planes. Buy one TX and enjoy the features for all your planes.