I've just started working on three pieces for an upcoming junior band bash, and one piece - 'The Grasscroft Ghoul' - has a G# in it, giving it an almost minor key feel. G# . . . hmm . . . 5th position . . . So I dug out my cheapie electronic keyboard which I got when I started playing baritone, and marked up the keys with a marker pen to allow for transposition to Bb. That way, if I had an awkward phrase to learn, I could pick it out on the keyboard first, and hear what it was supposed to sound like. Tried playing the G# - and it seemed way off. ??? Tried playing the whole three bars - A F D A G# - and it sounded reasonably together . . . but as though it was in a different key . . . hang on a minute . . . Sat down with the keyboard, pencil and paper, and started checking . . . sure enough, the keys were marked, but transposed into Eb, not Bb! I'd forgotten that, when I switched to playing tenor horn last year, I'd re-marked the keys accordingly. I think the phrase is "DOH!" But I know know what the G# should sound like!