Hi, I would follow Minns advice.

Yes you can fly 3ch but 4 is better even for a simple setup. Eg I wanted to turn damaged PiperCub into slope soarer so Setup airelons and elevator only. Didn't glide that well so put in motor back at 3 ch. Its a great, fun plane to fly, but boy am I wishing I had a rudder so I could be learning to do more precise acrobatics.