I take it from that, that the height has been set correctly now, but that the car still drops overnight, or have I misinterpreted this?
If sagging/leaks are still present, due to the warmer weather now, I think you will see less rapid dropping overnight, because cold weather seems to exacerbate the leaks...cracks open up wider with the cold?
Yes, the ride height is set to what it should be all round now.
The car does not drop overnight - it's purely the garage floor being uneven and my perception. The last ride height test I did was on a flat car park at work, which I did the same today.
Unscientifically, at the end of a period of sitting there from c08:30 > 17:30 today, my hand flat facing down now goes under both rear arches and stops as the wheel arch makes contact with my knuckles - which is now exactly the same both sides.
I will have to see how it pans out as the year goes on but interestingly - no damp / rain, no message!