I have the attached links on the rear of my X. This would be an easy way to lower your X and never have to mess with it again. You would still have the capability to lower it even more with the method you are using.
Discovery 3 4 Air Suspension lowering Links Module | eBay

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas