Received my two mice yesterday. The scroll wheel does not work at all, not on my A500 or my A2000. FreeWheel is installed in WBStartup and MX1000.driver is in User-Startup. Both of these systems work fine with previous scroll mice including the "black" Boing-logo AmigaKit model and PS/2 mice attached through a Cocolino.
While I hope there's just something obvious I've missed, I can only assume that these units are defective. I've submitted a ticket to AmigaKit.
Here's a short (5 minutes) video showing the issue:
https://www.youtube.com/watch?v=_hO5rIXOmq8I have a lot of patience for this old hardware, but lately have had a lot of issues with my Amiga projects and other projects that have me feeling kind of bummed.