Shoot, I have no idea if I need differential or not. The plans call for it so I figured I'd try to do as they say. I'm actually glad to find out I can't do it electronically. I was getting the idea I could but was becoming frustrated that I couldn't figure out how. I was playing with moving the servo arms last night and was pretty pleased with the ratio I was achieving. Unfortunately, to move the servo arms means getting a bit longer control rods so its off to the hobby shop later today. Thanks for everybody's input. Its these kind of issues that helps us newbies learn a lot. Next plane I'll be much smarter than now!!!