I think I might have now decided to use my Saito 100 (instead of the 91FX), which sounds as if it might produce a good CG, as the Saito is about the same weight, maybe a bit less as the muffler is a lot lighter.

It's interesting that the CG is so critical, but hardly surprising I suppose, if the model is so sensitive.

I have to clear the way to assembling mine, as I am still making two scratch built models at the moment!

-David C.