Generic Allen Key holder

After misplacing one of my allen keys, I recalled three_cross's wrench holder and decided to have a crack at making one up myself. Based strongly on that design, I removed some of the body ('cos I'm cheap), added some steps at the bottom and made it for the 5 keys that I had instead of the 4 in the original. Not sure if I got 5 with my kit, or if I added one while making various other mods for the printer... either way, now there's a nice home for them on the side of my Z-tower (secured with dou