Here's a story for you @Frank Sanoica I spent my career as a tool & die maker where precision measurements are a way of life. Many years ago there was a movement in the U.S. to change to the metric system. I was in favor of it but one of my bosses at the time was dead set against it. He wasn't very bright. The first things we had that were made to metric dimensions were huge molds that made the plastic liner that was the inside of a refrigerator. All the blue prints were in metric but most of our machinery wasn't capable of metric dimensions so we had to convert them to our system. I got the job of making a major change to the molds which involved turning them on their side and hoisting them onto a large bring mill and clamping them onto large angle plates, I the had to mill a slot about 2 inches wide and 1/2 inch deep down the back of the mold, then take it off the machine and reset the angle plates to 45 degrees, hoist the mold back on the machine and continue the cut, Now my boss was a nervous wreck. This was our first job converting from metric and he was worried I might not have got the dimensions right.( he didn't have a clue how to do it). He left for awhile and I got started, finished the first part and had was setting the angle plates to q 45 degree angle when he came back around. Knowing how clueless he was about the metric system and how nwevous he was about this particular job, I decided to have a little fun. As I was starting to set the angle I said by the way, Glen, what's 45 degrees in metrics. He thought for a minute and said I don't know but I'll go find out. He went across the shop to the tool room office to ask, As lck would have it, instead of just the other foreman was in the office, this was the time of day the engineers were in the office having coffee, the place was packed with people. I could hear the roar of laughter all the way across the shop when he asked the question. He came out, his face red as a beet, gave me a cussin' and said you did that on purpose. I just grinned.