You guys have helped me too.
- I bought a Dynaflite Super Decathlon secondhand, it was flown with an OS four cylinder fourstroke, and the guy who flew it said that it was very nose heavy.
Now I want to fit it with a Stihl chainsaw engine which is even heavier than the OS.
I moved the firewall back, but still had problems balancing at the manufacturer's reccomended CG point.
Now I understand ( I think) that I can move the CG back a little from the manufacturer's stated setting.
Anyone with experience on this model!

( Don't mean to hijack the thread)