Video of air or it didn't happen.
When I had set it to the recommended settings from H&R the back was lower than expected. On the smooth roads I was like yeah and on the bumps I was like oh crap that is dental work in the making.
It squatted in the rear as well which caused my headlights to point more upwards. I changed to 6K HID bulbs at that time and thought man they kinda suck. I went to my friends shop to realign to a better tire wearing alignment spec but not lose too much of the handling characteristics. While I was there I raised it up and gave it a couple of turns and it measured out the 27.5" from bottom rim to bottom fender and it leveled it out. That night I took the SUV out and BAM there was light on the ground. Haha.
There is always a give and take with springs and lowering. But I can live with this mod. I hope that you will find the right setting for your X5.