I have been flying a YS-110 the last 2-1/2 years and It is without a doubt the best glow engine I have ever had. Super reliable idle, great power, it'll swing a 15 x 6 APC @ 9400, de-tune it 300 - 400 RPM's. I've only run Powermaster YS/Saito fuel, 20% - 20%, and it almost looks like you've got smoke on most of the time. It needed very little tunning from the way it came from the factory.

I'm curious about the Cermark Pitts, I' considering getting one and putting a YS-140 in it for power. I've heard there used to problems with material quality (plywood) but I've nerver read any reports on how the plane flys and handles or what it's charicteristics are. I'd love to hear some reports on the plane.