I flew mine for several years before selling it.

The Satio 180 proved to be a good fit for the plane as it gave me the power I needed for knife edge loops and such. I used (2) high torque servos for the ailerons instead of going with (4) weaker or standard servos. I also didn't use the on-board glow option, as the Satio idles great and is totally reliable even without it.

I never changed the incidence on either wing from the design and it flew very well. Knife edge with about 8% aileron and rudder coupling was wonderful. Ground handling and landings were easy to manage as it has excellent rudder authority.

I never thought of Dave's design as deficient or flawed, but I did chose to modify (well documented) a few things to make the airframe more capable of handling the extra power of the big Satio.

IMO, if looking at 2-stroke, the Moki/Mark 135 is overdoing it. The lighter OS120AX (sweet engine) would be my choice as well. If I was to build another one, and was going 4-stroke, it would still be the 180 for me. No on-board, and (2) aileron servos (8411's or something equivalent). I did blow one 70 oz aileron servo in flight early on. No flutter and got it down safely.

I must tell you one more thing, I think. One day, it just wasn't 'feeling' right in the air as i did my normal routine. I cut it short and landed. This is when I discovered, to my astonishment, that the front dowel pins in the bottom wing were gone and so were the wing bolts!!!! The wing had been hanging like a parasol from the I struts and cabanes. I just can't imagine many bipes surviving that, but my Cermark Pitts did.

Opinions vary, argue incidence or whatever (opinions vary on this as well) but IMO, the Cermark Pitts is one of the best, and with a 180 or 120AX, hold on and have fun.