Hello. i would like your opinion about a problem with take off of my copter. I balanced the copter with the gimbal on z,x,y axis with the camera mount (canon 550d) on it and when i take it to the field for test i decide do not mount my cam at first. When i try to take off i see that the copter lifted the middle foot of the gimbal and push the two front legs on front as a result to hit my two front props on the ground. I recalibrate compass, went to other point , ensure level etc. Then i rotate the top frame and i see that some motors have more speed from others on lift off. My question is . Can the camera be the cause of all of this behavior as i haven't mount it and of course i dont even thought it er these? The copter was fly with great stability without cs3.