Someone here mentioned the "weak back Twist "from hanger9...duh...build it light and it's going to weak ...maybe it was the strong dumb thumbs,on not so perfect landings...I have assembled two of the Twist and have been quiet pleased with them ...but because they try to build it light means you have to fly it light..I am on my third twist now...It's not the planes fault...but then again what do ARF builders know?....Joe