so I sent my p3p back to dji for shell crack issue they had it for 20 days. I sent it in perfect other than the cracks condition spotless packed perfect with both gimbal locks in place. Also on firmware 1.19 as I've never changed it because it flew perfectly. Also the battery was at 50%. I have got it back with new shell but the foam gimbal support not fitted the battery on critical low warning and worst of all they have updated it to firmware 1.53 is this ok or can I put it back to 1.19? Why did they do this?