So the situation is...I flew from Victoria, BC to Calgary, AB and when I arrived...despite the Fragile stickers on the case, one of the bottom 'bubbles' was busted off with just a stub left over. Westjet was nice enough to give me a flight credit and a number to call if anything else is 'untowards'... Well, this afternoon was my first chance to get out and fly. My first location was too windy for flying so I relocated to a sheltered park. I set it up, calibrated the compass and the IMU's just to be safe. Checked that all the props were on and definitely secure (no prop locks). Lifted off and it kept wanting to drift downwards so I would give it more throttle. More throttle made it go more sideways. Tried to bring it on 'home' and sideways she goes again..into a hill... So I guess the question is. Is there a possibility that the impact that broke the bubble on the bottom of the case could have caused some internals to get thrown off that much? Or am I just a victim of a possible buggered uip unit like a the ones I've read about? Prior to this flight I have hours upon hours of safe flights with my Phantom...and about 2 hours of really great flights with this unit in Victoria. Some advice would be greatly appreciated here. ...also...can we get our hands on these arms yet???