Earlier, wrote:

I'm thinking like making a stick rib.

Maybe try making the rib out of straight pieces, and let the rib truss
lock in the curve for the upper and lower cap strips. I bet that'd
work.

Also, Graphlite comes in a variety of round, square, and rectangular
cross-sections. I think the standard round sections go down to 0.020";
it might not show on the Web but Jim Marske can get it for you.

Thanks, Bob K.