Main reason I am posting this here is due to concerns about how easy it is to remove and repair/replace the gimbal and camera unit, arguably one of the most vulnerable components of the copter.
Looks like it is not that difficult to remove the entire unit that the gimbal and camera sit on, as this video shows...

Not sure how easy it will be to carry out individual repairs on the gimbal mechanism itself but the entire unit seems easily replaceable.

One of the things I like about the P3 is that the gimbal unit itself is relatively easy to take apart and repair individual components without having to purchase a whole new unit.

Remains to be seen if the P4 offers the same level of repairability.

Thanks for sharing.