OK...
I have a trackball and spinner in the same cab. Trackball is a USB trackball purchased from Tornado Terry many many years ago. Spinner is a GroovyGameGear spinner hooked up via the mini Optiwiz that came with the Turbo Twist (also many moons ago).
When my PC powers up... it only will recognize the trackball. If I disconnect then reconnect the Optiwiz's USB cable, then both the trackball and spinner work as advertise (using any of the axis ..x, y or z depending how it's plugged in), and will continue working as normal until i power down then re-power. Then we're back to the PC recognizing only the trackball and not the spinner via the optiwiz.
I've tried changing USB ports a couple times... no change.
Anyone know how I can force both device to be recognized?