I am currently trying out a Gilles Berthod Aspin saddle which has been comfortable on the trainer for a long ride of 2 hours. I like the shape except for the fact that even with a Velo Orange setback seatpost I cannot get the saddle back quite far enough to my liking. I have it slammed as far back as I can go and would like another .5 to 1 cm to play with. Yes, I can raise my seatpost and gain a few mm further back positioning, but it increases the saddle to handlebar drop more than I like. With the Fizik Wing Flex Arione that I have been riding previously I have another 2+ cm to play with. Why can't leather saddle makers except for Selle Anatomica make longer rails for their saddles?