Resistance stacking was a huge lesson: each little discrepancy compounds across assemblies, so shop illustrations specify voids

https://www.scribd.com/document/1039773992/Finials-That-End-Up-Well-100-Years-of-Copper-Integrity-146161

Tolerance stacking was a big lesson: each small variance substances throughout settings up, so store illustrations define voids, shims, and slot lengths to ensure a best site fit.