JC,
if you find posts by Dunsfold Dave or Noddy, they regularly go out to the Ring in their 7's. Admittedly R400's but they haven't taken lights off, etc. If you drop them an email I am sure they will offer any advice. There are nuumerous owners who go over there including Angus who would probably help too.
If you can't find any posts drop me a blatmail and I will pass your details on to them.