This is a good point- imagine having to recreate, exactly, plastic foam manufacturing processes from decades earlier. How much shop tradition- "oh, yeah, the of

This is a good point- imagine having to recreate, exactly, plastic foam manufacturing processes from decades earlier. How much shop tradition- "oh, yeah, the official design says we do this, but Bob over there figured out a clever trick that saves a lot of time and now we all do it instead"- might you have to track down or rediscover?