Just a quick update re. the front calliper rebuild - I checked with my local discount car spares dealer before buying the rebuild kit (about £69 from Frentech) and found that he could get aftermarket replacements for only £94 each, so to avoid what could have been a pretty messy job I went with those. Had to paint them red and add the Subaru stickers, but that seemed to be a bargain to me and they fit and work fine. When I removed the old callipers I found that they were in a really poor state, so it was a good decision. The rears are working OK at the moment, but I did ask about replacements for them and no joy, the shop and a couple of other specialist parts suppliers I tried don't have the rears listed, so I guess it will be a rebuild when the time comes or a big bill for OEM parts. I did check with ScoobyWorld and they do a refurb service by post for £250 a pair (front or rear) including shipping back to you, but you have to pay to get the callipers to them. Hope that might be useful.