Fox
Takes a good weld to keep a vibrating harley together. Ever been on a BMW. Whole different world. The hardest certification I had was the Inconel .250x.060 tube in the .375 plate. Magnified xray seperates the good from the bad. They didn't want anything coming loose in the hot section in flight. I retired from a development shop at General Electric Aircraft Engine Division. Clean was absolutly necessary. Inconel is very dirty. Ill let go of the chain now have a good evening.
Tom