I'd have to check my spreadsheet. Was singing a Mozart D minor Kyrie recently with the amazing online Choir of the Earth!
Chrise was right and inspired me to find a new 24d with my 1 & 5 crossers, but I still can't parse it at all.
But the new 3rd letter made 27a solvable. I'd solved 28d recently by starting to make a list of thematics and noticing 8d and 16d.
I suddenly have an idea for my LOI, 1d: can "fans" be taken to mean letters 1,2,4,5 of a word (well, an abbreviated term)?