Hey Jarmo, another fine Euro product is the Italian made Super Tigre, I have 2 ST GS 40's that I use on my 40 size planes and they run flawless, cost less than OS's and parts availability in Europe should be as good as Irvine. The GS 40 may be a ringed engine but it keeps up with the ABC 40's and quite a few of the 46's in my club. Just my 2c worth, your mileage may vary.

Cheers, Tom.