Scheherazade - mvt IV letter "L" - low C "buttons" hint

[jtuba]

AND if you have a proper fifth valve (2+3), then push down all five valves and listen to the note get all tight and hairy sounding. Peacock knows what I'm mean.

Yessir. Three of my CCs have the 2-3. 184, 185, Nirschl 6/4 (came for West Coast, aftermarket work). It's the only way to fly, but I will have the Nirschl converted back, so I can sell the beast one day.