I don't have personal experience with DJI quads but there is a phantom forum dedicated to DJI users/pilots so might have better luck finding people with experience on there for DJI things:
Good Evening! As the topic is written my camera on my phantom 3 is dead after a crash in to a tree. The problem is following: After the crash the flexcable and the arm to the camera broke, but both the arm and cable has been swapped for new parts. Now when I start the drone the gimbal...
phantompilots.com
Some folks on forum here fly more of the "toy grade" or "bind and fly" ready to go RC things and some DIY folks like myself who are into building quads from parts or other "foamies" like those from flitetest.com Occasionally will see someone ask about DJI but usually will redirect to the phantom pilots forum since larger crowd more focused on servicing those quads there.