Old timer in Wichita told me to torque by feel and I spent two weeks chasing a fuel leak because of it
He swore the spec book was for lawyers and I wanted to believe him until that B nut backed off at 4,000 feet and I had to explain to the chief why my "calibrated wrist" wasn't on the paperwork.
Ever had one of those "he seemed so sure" moments that cost you a fortune? Man, I feel for you. That B nut letting go at altitude is a nightmare, glad it was just a fuel leak and not something worse.