Hey everyone, ok had my P2V+ for few months now and clocked up dozens of flights. I have used solid CF non self-tightening props pretty much since I got the thing and never had an issue taking off. Of course you have to give the throttle a bit of a stab or it might tip over. However.... The last few flights I've noticed it doesn't matter how hard I shove that left stick, the nose of the Phantom lifts before the tail and the props just miss the ground and it lurches backward about 2ft. Soon as it is in the air though, it's perfect. Hovers in one spot with almost no drift at all and flies beautifully. So I tried it with the genuine DJI plastic props and the launch was even more scary, the rear props mowed the grass a couple of times! I landed and took off about a dozen times, same tilting. Tried it on grass, bitumen and concrete. same thing. It's really annoying as it used to go straight up. Any ideas as to what is causing it or how to resolve the problem?