I also have a u can do zenoah 26 equiped ( giant ).....noooooo problems knife edge at all...sure theres a little coupling.... but lets get a plane lay it on its side using no inputs to keep it in knife edge attitude.(hands off).. and that will surely make us all the greatest pilots in the world. Set the CG as far aft as you feel comfortable for pitch sensitivity and then add another 1/2" aft and it wakes the plane up immmmmmensly... it 3d's rather nice, with proper setup ...in fact as well as my PAU 38% ultimate dle 111 equiped bipe. I also am not a sport flier, when I fly it is 100% 3d and 85 - 90 % WO throttle with one manuver to the next non stop till landing never a problem. Just for the record I am not a U Can Do fan just stating facts associated with my experiences with the setup in my plane