Thanks but I think in honesty I'll just buy a new one. I've not read great things about stages approach to problems and I know the warranty wasn't transferrable in the past so I don't want to have problems and be stuck with basically just a slightly worn crank.
Let me know if you're keen. Will put a proper for sale as up shortly if not but if I can shift it without having to that would be good!
It is in good working order but there is some of the usual heel rub from using it with winter shoes.