Resistance stacking was a big lesson: each little discrepancy compounds across settings up, so shop illustrations specify voids

https://finnxodh573.cavandoragh.org/breathing-easy-for-a-century-custom-made-copper-roof-covering-vents-that-keep-performing

Tolerance stacking was a large lesson: each tiny inconsistency substances across settings up, so shop illustrations define voids, shims, and slot sizes to ensure a best site fit.