MAKE SURE TO PRINT THE TEST OBJECTS INCLUDED FIRST. Test to make sure your bits fit in them the way you want. I made it fit snug on my printer so the bits don't fall out even turned upside down. You may need to scale up to get it to fit the way you want or if you just want them to drop in.
You can print the mill holder stand alone or with the drawer sides if you have room to mount it under your CNC table and have it slide out. There is also a matching drawer to hold your clamps and extra packages of mills.
I printed mine in petg but had to add some oil to get the drawers to slide and not stick on each other. There are bolt holes in the drawer brackets so you can add some bolts to stop the drawers from sliding all the way out.
Make sure to print the mill drawer with supports to the slots on the sides keep their shape.
Mill drawer holds 1/8" and 1/4" shank mills and collets for the dewalt DW611 router.
Amazon Basics PETG