Thats what I thought at first but now I know otherwise. Sure,some designs do harrier better and you get that locked in feeling. Caps are one of them. My second .60 UCD Harriers with the best of them,I get down and can touch the tail wheel if I want,can even turn it around and come back the whole length of the field. Wing loading is not the only thing,the wing must be stalled completely.Scale aerobats stall easier because of the thinner & sharper wings but the .60 size "Do" will harrier well if set up right. Both my first .60 and the .46 used to rock like crazy and I tried everything(I thought)to lock in but failed. When I got my 2d "Do"(.60), the only thing different was an inverted mount engine and I beveled the wing trailing edges to allow at least 50 deg. throw. Then I discovered I wasnt getting the maximum throws on spoilerons due to the radio. Since I solved that,I get at least 45 deg. up ailerons and have some travel left over for roll control. I almost gave up on the Do but now I love it,like I said-it Harriers with the best of them--now--locks in pretty good too.