Thanks guys, I really like this car so I can imagine that I'll keep tinkering with it for a couple of years yet!
The M3 skirts definitely work well with light colours, but there's bound to be a USA car in black with M3 skirts on the forum somewhere, for a bit of research.
I've actually changed some of the interior trim and gaiters since the last inside pics... Thought I had some new photos, but currently trying out the new Scotchprint
1080 carbon fibre wrap.