With two shapes, all the types and grits, it is no easy job to come up with packages that satisfy everyone. For my Domino I like having every size Domino in a Systainer, but for a sander, do I really want every shape, type and grit? Well, if someone GAVE it to me, sure! This is the kind of thing where speculation, even based on other sanders, has limits. I think putting this together by task is the way to go, but still not easy. For now I will be happy with a sample pack with the sander. I will try them out, note which ones I find most useful for my applications and go from there.