Wow you have read between the lines peefectly!!!! My cryptic message was meant to convey that all of our work may be quiclkly negated by a bad mechanic. Indeed to do any calculation and then not to provide written directions to the mechanics assembling the joint is like pouring a tablespoon of water on a massive fire.

I have reviewed actual failures of bolted joints in service and usualy they fail for a variety of reasons with no single factor sticking out.

Indeed in one instance a joint failed after being sucessful in service for over 35 years... I finally tracked down the problem... The mechanic who had assembled, maintained and broke down the joint on and off for the 35 years retired. He was replaced by an unskilled mechanic who had no idea how to make up a tight well assembled joint. Therefore this joint experienced a leak....

Everybody felt that it had to be re-designed.... all it needed was a better trained mechanic.