Aligning the holes of my random orbit sander to the holes in the sandpaper has always taken more time than it should. My solution was to use the tin from dollar store cookies, combined with a simple alignment jig. As you can see in the photos, the alignment jig is just a series of dowels that fit into holes drilled into a bottom plate. The sanding discs fit over it, loop side up. Then, when it’s time for a new disc, I can open the tin, and slip my sander over the dowels. Suddenly it’s a lot faster, easier, and tastier to reload my sander.