hey guys, I have a used carbon frame alu luggen alan cx frame which i picked up second hand from belgium. I am having a seatpost problem. I picked up a 25mm seatpost which is what I have read was the correct size. Now the post fits in fine, but once done up tight, the two bolts at the back are touching and you can still twist the post from side to side. it does apear to be a little loose compared to other bikes/posts. So i tried a 25.2mm, which fits in the lug nice and snug butonce into the carbon tube itself its too big. i was wondering if anyine had any ideas? there does seem to be a weird grease inside the seat tube already. (should i have some sort of carbon paste?).