Reading the 4br review of the new Yamaha sop got me thinking. Why do sopranos (and flugels for that matter) use an adjustable mouthpipe(?) for tuning as opposed to the more conventional tuning slide. Is it due to the relatively small amount of tubing in the instrument as a whole? And while I’m asking daft questions, why do the European based orchestras always seem to use rotary valve trumpets when the British based ones use the conventional type?