Hello, i have been browsing here since i got my P3A a few days ago, very useful information. Today i come to you with a slight problem i am experiencing: On fast, or even mid way throttled descents my P3A rocks diagonally, never side to side but horizontally from each prop, & not on all 4 props just 2 horizontally across from each other, kind of like a wobble, it never gets to the point where it gets so out of control it moves to the left or right more then a foot, but its still kinda scary. I am wondering, does it have something to do with an improper calibration, like IMU or compass, or do i maybe have a defective unit? Other than this slight problem, fly's perfectly! I am still within my 30 days of purchase time frame & i got it from Amazon so its hassle free returns. Any advice is welcome, thanks! Also, i was wondering, i got my P3A September 30th & i looked @ the comparison picture on how to find out which motors are the updated & which old, & the ones with the flat bottoms are actually the new ones, labeled 2312A, right?