Trackball: I'm guessing if your panel is laminated, you will want to have a mounting plate lying on top of the hideous holes you are about to route into your panel, but it would work OK.
Spinner: from what I've read, VERY easy: drill a single hole for the spinner, then mount it underneath; a few small screws into the underside of your CP will stabilize it.
So you should be able to do so. Good luck, but plan well ahead...
-->VPutz