In Action Pistol contests, I have seen the revolver shooters show up with 2-compartment tool bins on stands, that are drilled to hold cartridges ready to pick up with a speedloader, allowing one to get through the match with only 4 speedloaders and all the ammo arrayed for use, base up. If anyone knows what I'm talking about, I'd love to know where such trays can be bought, or how one would go about drilling a board accurately to make one. Thanks. (I'm switching to revolver this year.)