Gave the grey one some love yesterday. Finally located the source of an irritating clunk, turned out to be the top diffount. Removed, cleaned, retightened, now sorted. Also squared up where the gearlever was sitting in the gate, and, most importantly, gave him a thorough bath, wax, and interior clean.
Got my tame guru bringing his laptop.up.tomorrow for another couple of faults, then hopefully I can have him on the road next month!
It's been a while...