I forgot to comment on the carbon fiber/Epoxy bonding. I know that carbon fiber canoes are made with Epoxy. I would think that carbon fiber bikes are too, but I don't really know. If it is made with Epoxy, then Epoxy will bond very well with cured or hardened Epoxy. If not, there's still a 90% chance you'll get a good mechanical bond if you roughen the surfaces with like 60 grit sandpaper.
There are different formulations of Epoxy. The faster curing versions, like you find in the double tubes, give a much weaker bond than the slower curing types like West System. The stuff is expensive.