IO540
I have been thinking about this a bit more. The TB20 is, I think, designed as a long range tourer with IFR capability. It has no pretentions of aerobatic capability. As an older design it also does not gain its speed from clever aerofoil design or a particularly streamlined airframe - its more about brute strength. I would therefore have expected the designers to have built in a healthy quantity of stability both in pitch and roll. I wonder if there is any possibility the rigging is off, if yours displays so little stability in roll, or perhaps this is an unexpected quirk of the design?
n5296s
How did you fing the egg whisk?