Contrary to all the nabobs, the body and design of the outside of the P4 looks completely redesigned. The main redesign is the camera/gimble design. P3 and older were like the male anatomy, it hung on a slender thread and one good hit and it was toast to the tune of $750. I can't tell how this new one attaches to the body, but it almost looks like it snaps on, but I doubt it. It looks stronger though. So again, in a few months I'll be interested to hear if people survived major crash with camera/gimble still in place. BTW, the legs look a lot thicker too.