I recently bought a set of 25 R8 collets and was thinking of making a simple holder. While scrounging in the garage I noticed the collect would fit nicely in a piece of PVC pipe. A 10' piece of PVC (I think it is 1 1/2") cut into about 3.5" long pieces and about an hour later and now I have a compact holder for my collets. I used a couple of scraps of plywood to make a right angle jig and then glued the pieces together with PVC cement. A bonus is that it fits easily in the large drawer of my tool box.