I never went to WEP, suddenly spooling up that prop in the condition I had the 4u on flair did it every time. I finally gave up on flaps at landing with it and drove it onto the runway, and way down to the other end slowly using breaks. With the late AH2 graphics upgrade, it became more forgiving with flaps out during landing. And there became a whole faction of people who started complaining about the Hog family and it's magic flaps about that time too.