BlueMax I have an RCM trainer and it did just as you explained the first time I flew it. Mine was a combination of things. First: needed to change the thrust just a hair downward (small washers under the back two bolts of the engine). Second: I needed up incidence in the elevator (added washer on the back bolt of the elevator). This kept my plane level at all throttle positions. There is a chart somewhere on the internet for flight trimming a plane. The exact location escapes me now, but you may do a search on google or someone here may be kind enough to post it. It tells you what manuvers to do and what to look for to tell if your plane needs change in thrust, incidence and so on. If you need further help, feel free to pm me and I'll be glad to help in any way I can.