Great guy that Bob!
Monday I tried to edit/update post #11 above but it has not been revised. However, Bob’s description of what we found is best.
One question though…. Years ago, might Di-acro have offered a range of shim thicknesses appropriate for various material thicknesses?
https://www.dropbox.com/scl/fo/4bd98...o4jiqpzh0&dl=0