waterman: Thanks for the comments. The GP track is one that I could enjoy doing more laps on.
Took a bit of down-time to freshen the rear brakes - 23,000 miles is not too bad (and 850 easy circuit miles). OEM replacements installed with some RB 600 fluid. Had a bit of help from an assistant too.
Parts:
Pad Part number:
Not so free help:
Old:
Inwork:
New:
Incredibly easy install - modern brake system...added some fresh fluid: