RE: computer radio
Beau is absolutely correct. Even if you have a computer radio the plane should be set up mechanically correct before you ever start making any adjustments with the radio. In fact, sometime you can make a bad situation worse by trying to dial in adjustments with the radio on a plane that isn't mechanically correct. The skills you just learned in setting up your plane without a computer radio will actually serve you very well as you move through this hobby.
Ken