t1nk, its stable in a harrier. pitches to the belly very hard in high alpha knife edge, VERY hard. normal knife edge is about normal I suppose, I think I have about a 6% mix of up elevator for that. Im to chicken to do much 3d down low and some days I can torque it decent and others hardly at all. Blenders great and harriers great though. Walls I havent really messed with much, it seems a tad unstable at that but I probably just dont yank the stick fast enough, need to add a touch more throtle, something, I think it will do that well once I figure it out.