I do believe this was the culprit. Afterleaning the low end (gosh that is a hard to get a screw on a nexstar) that engine is running really well. She idles well now for long periods, and is snappy on the uptake. We spent my flight training tonight doing runway lineups.I can now take the plane down the center line of the runway with rudder and alerions. I had told my instructor that i had mostly been flying on alerions and elevator, and he brought the plane down and did something on his trainer box. Next timewe were in the air he told me that he had turned off my alerions and i was flying the plane on rudder and elevator only!! I have to say it was a good wayto force me to use the rudder. Anyway the plane flew for about 20 mins at idle to 1/2 speed, and still had 1/3 of a tank left when we brought her down. So I am really happy now. BTW if anyone has any advise on how to get that nexstar to land, at idle she flows across the runway at about 3 feet and wont drop down hehe. I sure my instructor will tell me what to do when he wants me to land,but gee whiz that plane still has alot lift at idle.

I must admit that getting that engine running right was a pain, but you know what... I bet you the next engine that I purchase I will be able to tune quickly. Its like anything else in life, it is a skill that I can use to help myself and others.

TY to everyone for the comments and assistance in this thread. Your knowledge has helped me, and hopefully I will be about to help someone else.