Thanks man and, yes, no point having a bike as a show piece in my view (not enough space in Japanese homes, even if I could!).
Shifting is spot on with the BOR rings.
From what I hear from friends, Extralite rings can be hit or miss with shifting, but, on a SRAM mechanical drivetrain, these have been very good (crosses fingers).
They seem to be an ideal compromise between good shifting and shifting weight.