Hi all,
I got tired of always looking for the correct shell holder to use with my dies, or my new Lee APP X-press shell holders, so I fashioned a simple 8-hole rack that you can mount on the wall and label. I found labeling to be very useful, whether by number or cartridge. Just remember not all the numbers are the same. An RCBS #2 is not the same as a Lee #2, so just be consistent in your labeling. I use all Lee shell holders, so numbers work, but if you use different brands, you can precede the number with the letter of the brand (e.g. H2, L2, R2, etc.)
Updated the SCAD to clean up the code a little.

Creality

Ender 3

No

Doesn't Matter

.20

20%

This is a non-stressed model, so you can go light on the infill and wall count. super easy to print. the screw holes are small enough I didn't need supports, but you may want to.