elenasgrumpy,
Not even a computer radio is going to let you adjust the aileron differential if you are using an Y-harness. That is because you are using only one channel to control the ailerons with. Differential is when one aileron moves less in the up direction than the other aileron moves in the down direction. When you use one channel to control the ailerons the up and down movements are going to be the same distance of travel.

I know that I'm an odd duck in the RC world when it comes to radios, in the fact that I have so many radios and don't want to put them on one computer radio. Part of that comes from how I got most of my radios. I got into RC at the same time that I was also starting a business. At that time money was very very tight, so a lot of the things I got in RC (i.e. planes, radios, engines, etc...) I got in trades. So I wound up with a lot of different radios (all Airtronics). Now that I can afford to buy equipment I really don't see a need to go to the hassle of trying to get all of my planes into one computer radio. I still have very valid reasons (at least in my warped mind) for not having all of my eggs in one basket. And they are, if there is someone else on my channel at the field I'm not always stuck waiting for them to clear the channel, I can just fly something else on another channel. Also, if I ever have to send the radio in for repair I'm not stuck not being able to fly while I wait for the radio to be returned.

Ken