Just to clarify, I have been flying my Saitos (FA-72 and since recently a FA-82) on 5% nitro, and I am very happy with its performance. With Nitro prices being what they are here in Europe, nobody in his right mind flies with above 10%.

At our local club we have seen some YS, but they have been a nightmare. I assume once you have some people around that know how to run them you are ok, but until then.

Basicly Saito and OS are considered a safe bet. More engines are ruined by running them too lean, then anything else.

For me, I have been flying Saito for years now, just fuel, put on the clip and run... Best engine around!