Today was the test of the Gurney tabs in full pattern mode and as Bob stated, "they are not coming off". The overall control difference was worth it alone. Corners about 2' tighter with the same effort and just as smooth. It may have been wishful thinking, but I also felt that the handle pressure on corners was less. Tracking in all maneuvers was better, noticeably in the RWO and hourglass. I tried something in my inverted flight to see if there was any improvement at different altitudes. Interestingly at 2' and 6' the plane was rock steady but at 5' it felt like it wanted to wander a bit. We have a domed circle and "rulebook" 5' here is about 6 1/2' above ground. I have been trying to find the right altitude for level that doesn't look too high. Another surprise was how easy it was to hold the takeoff down.
One thing that has sparked my curiosity. I felt a larger improvement in corners than I expected. Could any of that be the logarithmic since it produces a wider flap/elevator ratio?
Crist Rigotti tried them today. His comment upon landing was the same. "They stay on". He is experimenting with width. I will leave it up to him to report on that if he so desires.
Ken