Cool, thanks everyone, I think I will use a lift system. I remembered late last night about a lift they used to have in my old university math block that was a constantly moving series of platforms that basically when 'over the top' when they reached the top. Think a ferris wheel, but instead of a wheel shape, it was an elipse. This would work great as a suitable dwarven water powered lift system and it encouraged me to think about water supply, so I've made it so they've cut an aquaduct in by tapping in under a lake near the summit of the mountain. Very dwarven way of doing things. Need water? Divert a river from around the mountain to through it. Haha