Hi I've been building this H quad for a couple months now because of problems Withi wobbling so I figuered it was a bad esc and changed them all out. Since then I have had a number of unusual problems start effecting the quad. I messed around with the parameters and sorted most of it and all motors spin correct directions, props right way all basics covered here. The quad responds well to forward back yaw all axis working BUT, as soon as I try take off it wants to spin donuts on the rear left axis motor. So it just won't fly not without crashing. So I noticed a couple videos on utube where others had the same issue. First their H quad was spinning on all axis doing left yaws similar to mine but mines only on the one. Then the same guy says he's fixed it but I can see his quad has the same wobble as mine had at the start. Unfortunately he didn't speak or give explanations so I dont know if he fixed it or just gave up. Can someone help with respect to this problem Im having. It's becomming a joke, months to build a simple quad, I built my first in a couple weeks. Then again I have switched to 3DR APM since the first NAZA I built but I'm getting nowhere with APM either with fixed wing or quads they always have had issues on take off with pulling into turns even though everything is working correctly on the ground.