Thanks guys!
Originally I made the engine cover hinges out of brass and styrene, but it turns out they weren't strong enough. I made a new pair out of brass reinforced resin but I was concerned they would not be strong enough either. So I machined a third set from aluminum and pressed the brass tubes into them. They ride on stainless steel and brass tubes, hopefully that will be strong enough…
This created a weak link issue and I had to replace the plastic hinge eyelets in the engine cover with metal parts, so I machined new aluminum ones.
Brass tubes are used for the secondary hinge points.
