I agree the Do is cheap & poor design(structurally)but I still enjoy flying it even though I have to make several modifications to strengthen & improve flight characteristics. People around here put it down mainly because of its appearance but when they see me hover 1" off the deck,harrier 1" up,walls,RH ect,ect,ect,then its cool.What's really cool about the Do is you don't have to spend mucho $$$ to 3-D,in fact, the low cost helps with the "pucker-factor" which often prevents trying those risky maneuvers down low. It does couple bad in KE but that can be minimized with mixing or the thumbs(practice), and it can dangerous to harrier this plane,drop the nose & it will snap out,any wind gust can knock it out of harriers. I fly it within its capabilities,no down low harriers or hovering when its windy. I fly it a lot in the AM or evening when its calm,do everything 3-D with it.