One other quick update, I was getting a lot of juddering at very low speeds (as I came up to a junction). I upgraded the discs to Brembo Oro ones and changed to sintered pads. This the set up worked much better but sintered pads wore out in under 3,000 miles. I've since changed back the the normal pads. PS If, as planned, I change the bike this Winter then I will probably have a set of callipers for sale (and possibly the discs)
