I agree, the v5 Case feels very sturdy - showed it to some Friends (they fly real Gliders) and they were very impressed by the look and build of the V5.
Thanks @auturgy I was not aware the Pixhawk 4 also has IMU dampening. I think this is crucial, I have a 680 HEXA with the mRo X2.1 and besides i use dampers the vibrations are rather high. So I am looking forward to use the V5 on this Platform.