Ultimaker 3 Print Core Holders

This is a simple device for keeping idle print cores neat and handy around the printers. The simple geometry makes the part very easy to print, virtually fail-proof. I am using the 8 holders version but I have included different versions to hold 3, 4, 6 and 8 to suit your need. I didn't make it for 1 or 2 simple because the holder is less stable and there are many other neat ways to store 1 or 2 print cores.