Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Something wrong there Ewan, the standard caliper arm should NOT under any circumstances need shimming.
That looks upside down mate...The side with the visible spring goes down (the flat surface goes up)
Top pic is bottom of seal, pics 2 is the side you should see when installed.