I fly FAI stunt but the rules are quite similar to your AMA rules. There should be 2 level laps between manoeuvres but watch out for that takeoff. The model is released and starts to move on the ground (naturally ) but from the moment it leaves the ground you have to do a steady and slow climb to normal level flight height which should be reached exactly over the point the model first left the ground. That's one lap of flying so far. Then you have to continue in level flight for another 2 level laps starting from where it first got to normal level flight. That's the end of the judging for takeoff. So far you've done 3 laps so then you have to do another 2 laps (minimum) before starting your wingover. What you need to be careful of here is where the position of the takeoff ended and where the wind is for your wingover to begin. This could be a little less than the 2 level laps between manoeuvres so I always do 1 extra lap before the wingover in case there's an over-critical judge. You only get the one shot at each manoeuvre.

As far as tune goes, every engine is different and some won't do a 4-2-4 break so at this stage of the game all you want is a nice consistent engine run that you feel comfortable with. An awful lot depends on what prop you're using but for starters tune the engine rich until you hear it go into a steady 4 stroke then lean it until the it's just barely into a 2 stroke and try it. If it's got good line tension and you're feeling comfortable then fine but if you don't feel comfortable then wait until the tank runs out and next flight lean it out a little more. I don't particularly like setting an engine close to peak for test flying because some will lean out in the air and then you have an agonising wait for it to run dry and believe me, it'll feel like it's running for 3 hours .