[Richard]

During the generator project I stumbled into a neat hack for copper sealing washers. They must be annealed if you are going to reuse them. Annealing is simple. Heat to dull red with a propane torch and dump into water. Softens them up so they seal.

I had struggled with getting the banjo bolts on the diesel engine to seal in the past, worrying that inwould over torques and break the bolt. 

No leaks this time and without excessive tightening