Hornady Comparator Insert Holder

All the organizers I found where “boxed” like you travel with them lol. These stay in the drawer of my reloading bench and offers quick access.

My second Fusion 360 object and shared printable. This organizer holds both the Hornady bullet and headspace comparator inserts. There are also spots for the Allen key and extra set/thumb screws. The bullet inserts have a slightly larger OD so they can't swap with the headspace inserts. The Allen key is a tight, press fit and the screws will easily thread in so they don't go flying out if you knock it over.

I printed this in PLA @ 100 mm/s, 15% infill and 1.2 mm walls. I used bed adhesion to prevent the edges from curling. The PLA is Mailbox Red from CC3D on Amazon, a good match for Hornady red. That's a SPI caliper box next to it.