Hi!
Well, I rad the whole topic and i think or better said i am sure that the 120 AX is the ideal 2 stroke engine for my Funtana S90.

I had the 91 SX Acro Sport till now, not flied yet and so the flying weight was ~4,1 kilograms. (with CFK tuned pipe)
Anyway the good and powerful Yamadas are too expensive and require a lot of nitro.
I prefer 5% nitro and not more.
So i'll take te new AX!