Can you use this clamp with a carbon fiber...
Can you use this clamp with a carbon fiber seatpost?
Sure you can. You have to be more carefull but seatposts are quite strong. When it comes to clamping carbon seattubes or seatmasts I would use a european fork mount work stand.
i have the easton haven carbon fiber and i have zero issues. push the clamp in and turn the micro adjust knob a couple times. you'd really have to crank it to damage the post and you'd know you were turning it too hard.