Yesterday's assertion that I have a couple of "a couple of incomplete (Suntour Superbe) groupsets" turned out to be wildly over-optimistic.
What I've got is a pile of deraillers, a pair of LD-2000 clamp-on shiftlevers, and a brakeset that is currently on another bike. Of course, I am only assuming that the RT frame takes a short reach brake...
The rear deraillers are a mix of basic Superbe RD-2100, with steel hardware; and about 1-7/8 Superbe Pro RD-3100, with aluminium pivots and pulley bolts.
There are a couple of OK looking Superbe FD-1500 hinged clamp front deraillers, and I think that a little more rummaging will eventually expose one of the weird band-mounted Superbe Pro FD-2000.
I have two pairs of brake levers, without hoods.
My one spare set of hoods is earmarked for Team McCall, so I will get a set of white Olympic hoods from ebay which will complement the black/white colour scheme.
My Superbe seatpost turns out to be Sugino Super Mighty, which is OK with me, and the Super Mighty crankarms have a decent set of factory-drillium 50/42 chainrings.
Suntour and Sugino catalog pictures from Mr Gami's catalog scans page