If your radio can be programmed to do it of course that is better. I have the 7C and you can slave one channel to the other but the problem is that when you trim the model out it only trims the main channel. So on my radio it was not possible to setup the dual elevators so I used a reversing Y. I bought the one offered by Tower and have had 0 problems with it. I would have to see proof of the "drift" in order to think that it is a common problem.