I will double check, however I installed them according to the manual: No new springs installed, just bushings, shocks and ball joints. I cannot say for sure, but I cannot recall that the height difference was present with just the new parts installed, but before yesterdays alignment. Would you please educate me about the twist-in spring booster? Thanks, even though the last alignment I did was about 40 years ago, during my apprenticeship, it is like riding a bicycle: Once you learned it, you will never loose the skill. Part of the reason why it took me so long was, that I always had to remove the bolt in order to add/remove the shims. The factory shims allow that w/o removing the bolt. When I did the drawing for the watercutting, I tried to copy the stock geometry and did not think far enough to understand that with the huge thickness of my shims the "stock-feature" will not work. I probably would have been better off to just design a simple slot and pay more attention not to loose a shim while tightening the bolt.