thank you so much - what a treat!

I can sing [as in carry a tune; I used to sing 8-part harmony in Madrigals] and the Wizard can REALLY sing.

I like getting together to sing [holiday carols, for example] but my tastes are so narrow that I bow out relatively often. [although OA and nma are working on me, rather successfully I think!]

I look for the same symmetry in my understanding of how nanomaterials self-assemble into higher order structures. Not coincidentally I have a lot of math training and sing weekly. I don't play my saxophone anymore; I just don't have enough time to practice that to stay near a top level. With singing, once per week is enough to keep me at about the equivalent of a golfer with a 2 handicap (close to professional, but not quite).