OK Randy, do I just need to order the trackball and your spinner?  I would want USB.  Should they all be the Number 1 device??  It will be the only trackball and spinner I use?
Yes, they will both run on their own and can both be device number 1.  The only time you would want a device two of any of the USB products is if you already had another of that same type of product (IE. 2 spinners, 2 trackballs, 2 GP-Wiz, etc.)
Even though the optical controls are based on the Opti-Wiz, each product group has been given its own product ID so there is no confusion at the OS level.  An Opti-Wiz won't conflict with a TurboTwist spinner which won't conflict with an Electric ICE Trackball, and so-on.
RandyT