I purchased the same spinner last summer. It's great and I really like using it for polishing most of my equipment. As for sanding, I have learned that for me, the CTD pads work the best. However, YMMV. The Abralon and Siaair pads wear out unevenly and they tend to load up if you leave them in one spot for too long.
There are some good videos out on YouTube regarding this subject and how you would sand your equipment properly. Along with the six sides pic above, I would highly recommend "wet sanding" before trying dry sanding on your balls. Why? Because our hands wants to "fight" against the speed of the spinner initially so that we "see" the pad working on the ball. However, you can wind up cutting the ball too much in one or two spots because of the speed of the spinner.
For me, wet sanding helps to prevent uneven spots on the balls and it helps with helping to decrease excessive loading of the sanding pads. Once I got used to the speed of the spinner, I now get really good results, which gives me near factory finish surfaces. YES!
Good luck with your new toy! Peace!