You could just use the player 1 or 2 buttons and not have dedicated buttons for those items.
Well I am definety going to have 3 buttons dedicated for the trackball (for golden tee etc)/mouse, and I am going to have the spinner mounted directly about the trackball and I wondered if I can have 3 buttons dedicated to both the trackball and spinner?
If not, I will dedicate the 3 buttons to the trackball and use player 1 or 2 buttons for the spinner