Hi folks, Last night, I had quite a scare whilst flying my Vision over the fields at the rear of my house. This resulted in me crashing the Vision and thankfully (or at least I hope) not doing any major damage. Let me give you a little info... I recently installed one of the 3D Power 2-axis Gimbals which I ordered. Did a flight with it and whilst it wasn't quite as rock-solid as some videos i've seen done with it, it worked fine. No problems at all. That is, until last night. I took the quad out and flew it up to about 500ft and took a few photos and videos etc. Battery was still on 70%+ on the quad, controller batteries were fine and the repeater batteries also fine. I started to bring the quad home and when it was around 60ft up and around 100ft away from me, I started to reduce height vertically... and thats when disaster struck! Suddenly, it began rocking from side to side uncontrollably and losing height. Nothing that i tried would gain control of the quad.. and this resulted in it crashing into the ground. Now, between me and the quad was a 6ft fence, so it also lost connection. Just as i was lifting up the fence panel to clamber under, I head rotors and it was hovering above me again!! Obviously it had somehow hit the ground, recovered itself, realised it had no connection and the "Coming Home" function had kicked in. Despite a slice in one of the props, it managed to land successfully where it was launched from (thankfully saving me a job of clambering under the fence). My question is... does anybody know what may have caused the sudden rocking side to side of the quad? Could it have been the gimbal freaking out, causing the quad to somehow try to compensate for it, and rock... hence losing control? It scared the life out of me and thankfully the quad didn't appear to be damaged (i've not had time to test it fully as yet). Also, does anybody else have a 3D Power Gimbal and can advise, from a newbie point of view, how to calibrate one? It came with absolutely no manual at all. Thanks very much for any help.