Originally Posted by mike alanko
Oh, it really looked like a swallow! Just the rails are really deep - I can barely get a wrench into mine.
Go to your local Sears or other hardware store and buy a 10mm ratcheting box wrench. You can access the bolts from the back of the seat and just swing that wrench in as small an arc that you have room for without having to reposition the wrench on the bolt. Sheldon Brown recently found one on the road, took it home and used it, and announced that it was the greatest invention for two bolt seat posts ever conceived.