I completed my y6 and am having trouble getting it in the air. All the escs are calibrated and the motors spin at the same time when armed. I have Mission Planner set the frame configuration to the newer y6b. The top motors spin CW with the 10 inch pusher props and the bottom motors with the 11 inch normal props spinning CCW. I'm using a new Spektrum Dx7S with the AR8000 receiver. When I try to take off the left arm lifts up first and makes it want to tip over. Any tips would be greatly appreciated.