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

https://juliussxgk239.yousher.com/what-occurs-after-100-winters-copper-smokeshaft-shadows-by-salvo-metal-works

Tolerance stacking was a large lesson: each little inconsistency compounds across settings up, so shop illustrations define voids, shims, and port lengths to ensure a perfect site fit.