I bought my friend and I each a Forte Precision seatpost at Performance today because they were really cheap, and we both wanted new ones anyways. We both have Panasonic Sport 1000's, and I used a caliper to measure the post which came to 26.85mm, so I bought 26.8mm posts. I can't get the new post in! Sheldon Brown wrote that the DX-2000 uses a 26.6mm post but that uses a totally different tubeset. Anyone know what size I need?