For anyone interested in trackballs, the GameBall thumb people have announced a pre-sale for the GameBall Thumb on the 20th. Specs look nice and it can be operated wirelessly as well as via a cable (even nicer IMHO).
I’ve been eying that since my stock of wired Logitech trackballs is now all in need of microswitch replacements. Happy to report back when I get mine if anyone’s interested.