I disliked the Selle Royal Viper that came with my Giant SCR2.0, so I splashed out on a Fiz:ik Arione (Merlin Cycles were doing them for £50). The saddle is great, but I cannot get it to stay at the angle I want at all. I start most rides with the saddle angled slightly downwards, and invariably finish with varying degrees of nose up angle. The Fiz:ik is somewhat longer at the back than the Selle, and I think my perching on the rear of it on hills provides sufficient leverage to bring the nose up. Is this just a case of needing to tighten the saddle clamp up more, or is this always likely to be a problem with a single bolt type seatpost/clamp and a long saddle?