So, with no further delay, here's the current status:
I made one error in the parts selection: I knew the front mech had to be top pull, instead of the down pull version I got with the groupset, but the alternative I bought on here, was the wrong diameter (31.8 instead of 34.9), which was entirely my mistake. Consequently, I couldn't finish the bike yet.
Other parts still to be sourced are some 747 pedals and bar-end covers.
I'm pretty pleased with the result. It's very close to how I bought it 20 years ago, except it's full XT now, rather than XT/LX, but I think the all-silver theme (instead of the LX black), suits it well.
A proper photo shoot will follow when it's truly finished.