Bump from the dead. TGR pitched in and did a chain and sprockets swap for @archetypicalone because, well, it's about as easy as lending her a chainbreaker. Sprocket wise it was -1 on the front, alloy sprockets, 520 conversion and pretty easy job really. The front sprocket cover on these is a bit of a pain to get off, and, they actually weigh a lot for a dodgy bit of plastic. To make life easier and because race is best for the road, I whipped up @archetypicalone a 2mm sprocket cover out of some spare aluminium sheet I had sitting around. Not bad for 45 minutes work + a bit of time to paint it blaaaaaaaaaaaack.