ImExPS/2 Generic Explorer Mouse / Trackballs in 13.1

Since 11.1, this device identifier has been usable to set the buttons for our trackballs; unfortunately, in 13.1 it seems to have changed. Tried to run xorg -configure to generate a configuration that could be tweaked, but it borked X and forced a reinstall.

The log shows a three button mouse with scroll wheel being detected:

[ 180.419] (II) Using input driver 'evdev' for 'Generic USB K/B'
[ 180.419] (**) Generic USB K/B: always reports core events
[ 180.419] (**) evdev: Generic USB K/B: Device: "/dev/input/event1"
[ 180.419] (--) evdev: Generic USB K/B: Vendor 0x13ba Product 0x17
[ 180.419] (--) evdev: Generic USB K/B: Found 3 mouse buttons
[ 180.419] (--) evdev: Generic USB K/B: Found scroll wheel(s)
[ 180.419] (--) evdev: Generic USB K/B: Found relative axes
[ 180.419] (--) evdev: Generic USB K/B: Found x and y relative axes
[ 180.419] (--) evdev: Generic USB K/B: Found keys
[ 180.419] (II) evdev: Generic USB K/B: Configuring as mouse
[ 180.419] (II) evdev: Generic USB K/B: Configuring as keyboard
[ 180.419] (II) evdev: Generic USB K/B: Adding scrollwheel support
[ 180.419] (**) evdev: Generic USB K/B: YAxisMapping: buttons 4 and 5
[ 180.419] (**) evdev: Generic USB K/B: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[ 180.419] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:12.0/usb5/5-1/5-1:1.1/input/input1/event1"
[ 180.419] (II) XINPUT: Adding extended input device "Generic USB K/B" (type: KEYBOARD, id 9)

But none of this functionality is working, .. so the question is, how does one properly configure a trackball in 13.1?

TIA!

Lee