Described by cmartin HERE
I used a #10 (.010") guitar string as the pin and insulation off what I think is 32 ga wire. Remarkably free and the availabe deflection is far in excess of what is needed. No beveling of the hinge line needed. The pic shows a single lengh pin that connects both hinges. The final install will be two short lengths. A bit of white paint and tissue covering should hide the black insulation quite well. Rudder next.