Hi Brandon,

Yeah, that is a slick technique. I could be wrong, but I think that's how the interior mandrels for commodity carbon fiber tubing are made.

Re the interface between the carbon outer layer and E/G core, the problem is that putting an elastic layer like toughened epoxy between the two means the carbon doesn't stiffen the E/G beyond what the epoxy transfers across the boundary. The carbon layer is a lot of work and brings problems of its own, so it has to make a big difference in stiffness or it isn't worth the effort.

I honestly don't know whether this is making a mountain out of a molehill, only that it isn't obvious what would happen.

Jeff