Recumbent - How to mount a carbon fiber hard shell

seat onto a frame? The specific is the drilling the shell and then using? Bolts with fender washers to spread out load? Do I have to epoxy over the bolts, what don't I do?

The seat is pure with no holes. I am putting on my trike and need a mount for the middle back and under the butt area. Currently working on design for seat mount clamp.

DH

There's no need to drill holes in the carbon fiber seat. You can epoxy either curved tubing (either expensive aluminum alloy aircraft tubing or cheaper electrical conduit) or two-by-fours cut with a bandsaw to match the contourof your seatback.

I'd suggest epoxying these ribs so they run from bottom edge to top edge of the seat back. I'd fabricate three ribs, one in the middle and two for the left and right sides. Make them all parallel. Use marine epoxy from westsystem.com

My Baron has 4 bolts for the top and 4 more for the bottom mounts. Bolt heads are phillips, low profile. I use small fender washers with threadlock, no epoxy.

I can't find the place I bought it now, some big recumbent bike shop in Plant City Fla ( I think, in 2007) I had asked the guy about bolts, I'd rather not drill it. I'll explore bonding. My back support I'm making to bolt on to the frame with a 3" dia aluminum flat disk with rubber to contact the back of the seat area. I'll have to test it to see if I can get away with out bolts for that area.

As a homebuilt there are lots of things to test. My first development frame is at the painters now!
It's amazing how you learn to redo things differently once you start building.

DH