I modded it into a taildragger with retracts, also added 1" to the rudder but kept the original shape. The rudder does cause some serious adverse roll, but I also found that with the flap down it doesn't. You can cruise around with the flap down right on the deck just above idle and it handles great doing all rudder turns. I wonder if that was intentional or just lucky. Two other friends that built them at the same time as me enlarged their rudders and made them like a Cap rudder. They said it helps a bit but does not solve the issue of adverse roll. I'm not sure if it has any effect, good or bad, with the flap down.