I have some small Kevlar sheets that are about 1/128" thick (0.0105" exactly) and my idea was to rubberize or seal it with a fuel-resistant coating, sandwich it together, and see how it worked. Brad's Kevlar-reinforced vacuum advances, or something like that...
Like Denny says, it was difficult to find anything thin enough for the diaphragm material, BUT- if I would have known about this website this time last year, I would have a working rebuilt vacuum advance right now. And that's just from getting the "Buna-N" material validation.
Brad
