Those look like pretty nice mods.
I'm sure you'll have to be careful with the threads if the carbon is threaded. I'm familiar with carbon fiber and use it a lot, it threads well but it's easy to cross thread because its relatively soft. If you're careful with it you should be fine.
A copper sleeve laminated in the tube would be best, thick enough to cut threads in to. With a copper switch and cap it would be a low v drop mod.
I may have a new project!