This is all tremendously useful (and interesting) stuff, folks. Many thanks. And keep it coming!
Given that we are all vastly knowledgable etc and endless lists of examples may not be the most effective assistance, some restrictions would be useful. We can marvel at Godowsky's efforts, but in the long run, those of Grainger (as Descombes suggested) may be more pertinent. Ancient or modern? You'll say "both", I bet . . .
What about all those versions of the Minute Waltz? Many were recorded by Fredric Ullen - Joseffy, Reger, Godowsky, Sorabji etc - and there's one (not in that collection) by Finnissy . . .
Perhaps FU (pardon the expression!) didn't know about MF's MW at the time. For the record, I once wrote to Mr Parsons (Nicholas, not Michael) about the possibility of using one or more of those items from FU's
Got A Minute CD as intro music for at least one series of BBC Radio 4's long-running panel game
Just A Minute ("JAM" to the cognoscenti on the inside) but the polite answer I received deferred to the memory of the late Ian Messiter (who thought up the game) and whose son Malcolm (the oboist who was a contemporary of mine at RCM, London) was probably the person to whom any such enquiries should be addressed. I've almost certainly done many more stupid things even than that in my time and "JAM tomorrow" in that proposed form has, as one may notice, never materialised. Ah, well...