After I was well into turning pens, I really started to get a sizeable collection of bushings. Needing a way to store and separate the bushings, I came up with this method of storing as well as keeping all the instructions that came with the pens. First I made an inventory of the kits as well as the needed drill bit sizes, I first kept them in alphabetical order but that quickly went away so I just add new kits to the end of the inventory sheet. The instruction sheet is placed in a clear binder envelope with the number corresponding to the inventory sheet. I then got these plastic tackle boxes from the local Walmart and numbered each compartment. I placed a set of bushings into the little compartments so that the number of the compartment corresponds to the number on my inventory sheet. I also have plastic boxes for the required drill bits as I only use these bits for drilling the pen blanks. This system has worked for me for about 20 years or so and it is really easy to maintain. Everything is stored inside one of my rollaway tool boxes which houses most of my stuff I use for my lathe.