Steve, if your engine adjusts okay on the groung then leans out about 4-5 minutes into the flight, it may be getting hot. I would first try putting some baffles in and a piece of trianglusar wood in FRONT OF the bottom air-exit hole. That creates a low pressure area that sucks the hot air out. Try it first and see if that helps.

I learned to fly the IMAC basic pattern by stringing 2 or 3 of the maneuvors together and then moving on down through them until I did all 10. You will then find it much easier to do all 10. The hardest thing to learn to do in IMAC-style of flying to learn how to fly a STRAIGHT LINE. I have been in the Sportsman class for going on four years now and I still practice that!! The second thing is to get used to seeing the inside wing looking like it's too high (makes you think you are turning away from you).

You have to get your plane trimmed out so that when you apply rudder the only thing the plane does is to do PURE YAW. You will probably have to mix out aileron-rudder roll and aileron-elevator pitch coupling but with a computer radio that should be easy enough to do.

I hope you have better luck flying today than you did yesterday.

Bobby