RE: Seagull PC-9 120 size...
I had my maiden flight yesterday, using a DLE 20 and it flew great. I want to thank all the contributors to this thread for helping me avoid trouble.
I used 85 mm back from leading edge at root for the CG and needed no trim. I did find that the suggested throws in the manual weren't sufficient. The high rates worked pretty well for the first flight, and I will use those as the low settings in the future. I tried a roll on the low aileron rates and it only took about a minute to complete. The colors looked very pretty against a blue sky. I was expecting landing to be difficult but thanks to the info on this thread I managed fine.