How BMW geeks use Alfa shims for creative valve adjustments

Last year, I wrote a piece detailing the procedure for valve adjustment on single overhead cam engines with eccentric adjusters. In it, I described how you rotate the engine to put it at top dead center (TDC) for a cylinder, verify that the rockers are on the flat part of the back of the cam lobes, use a feeler gauge between the adjuster and the top of the valve stem to check the gap, adjust it if necessary using a small wrench and an Allen key or equivalent tool to move the eccentric, and then rotate the engine to move to the next cylinder in the firing order.

This is a companion discussion topic for the original entry at https://www.hagerty.com/articles-videos/articles/2019/02/25/bmw-geeks-use-alfa-shims-for-creative-valve-adjustments