I've been storing my R8 and 5C collets as well as my commonly used R8 tools on a wood rack screwed to the back of a tool box. Today I added another rack for the ER40 stuff I just got. The only complaint I have about this storage method is everything gets covered in dust. The tools are easy to access and when I select a tool from the rack I give it a squirt of brake cleaner and blow it off with compressed air to remove dirt and oil before inserting it. I would be interested to see how others store these tools.