Alex, I'm 5ft 9 as well and I spoke to my doctor about it and she recommended a goal of around 12 stone. And then when you get near it, seeing what feels right for you. I haven't been that size for a very long time, so I don't know what weight would seem right, if that makes sense. So I think you're doing the right thing. If you get to 12 and 1/2 stone and you go you know what this feels right, I'm comfortable, you can stop, or go to 12. Or you might get there and think you could lose an extra half a stone. So think you're definitely taking the right attitude towards it.