I finally got my permanent seatpost a Tune 31.6 330, and I go to attach it to My Tune Speedneedle Marathon(Love the seat very comfy) and it won't work, the rails won't fit in the clamp, they are too wide. The Speedneedle works great with the Thomson post I was using, and the Tune Post works fine with the Fizik Arione seat I also have, but Tune and Tune won't work. Any Ideas? Will the rails on the Speedneedle spread if I force them a little?