Sounds like your experiences are very similiar to mine. I had a UCD 60 and have a Yak. I started hovering w/UCD and could do HA KE well but harriers were difficult to impossible to get into untill I used stall strips on the leading edge. I could then get into a harrier sometimes if the rocking wasnt too bad at the start. After some time at it,I was doing harrier turn arounds at several feet off the ground but the UCD always remained unpredictable at some point during the maneuver. It would roll or snap inverted occasionally and most of the time I caught it. The last time I flew the UCD I was far away in a harrier and turning around when it snapped again, I caught it inverted,pushed up on the stick and throttled up but I think it was still stalled cause it snapped again and went in. The Yak does wing rock some but it NEVER snaps or does anything nasty. Makes it much more comfortable holding it low and slow. The explainations of using ailerons in a harrier on this thread makes sense to me except one little element is missing I think- its anticipating the wing rock, actually hitting right aileron just BEFORE the right wing tip goes up. If I do it this way, the rock stops for a while. Even if I hold a little right aileron after that, it still may rock some, so I have to repeat the aileron input again when needed.Wind and direction is definately a factor. The wing is more fully stalled downwind but the plane travels faster, need more throttle to maintain altitude. Into a wind I get more rocking. I had a couple calm days this summer and what a blast, no problems with harriers,barely had to use ailerons at all,actually got in 3 landings, hit the prop once(not broke) the other 2 times engine was still running-what a rush!!! I ,m working on a Showtime, hope its "The One".