Wouldn't that put an undo stress/pressure on the CF tube and cause it to crack?
My Late Father was The Machinist... You have to machine the expansion device carefully ..
so it does not concentrate the force in any one place .... friction over a Wider area.
its Really ready to just strip and hang it Up, for wall decoration ..
I have made 2 bikes work better, with slipping Seatposts with a second Tube clamp band
above the frame Gripping the seat Post Itself.
on My Brompton It's a Second QR lever type.