Quad loading shell caddy/holder

These are the V1 versions of some quad-loading shell holders I'm working on. I printed mine out of PETG with 4 walls and 50% infill. I've included a picture showing the ideal orientation for strength. If you lay them flat, the holders are likely to snap due to layer line weakness.

These holders are designed for 2¾" shells, but you can probably use larger ones if needed. I've tested five different brands and types of shells, and they all fit. I'll likely keep updating the design as I make small tweaks and changes.

I used 10-32 screws directly into the plastic, but there is room for a nut on the other side if you prefer. I've also uploaded STEP files to make them easier to modify for your specific needs.