What is the best storage for cartridges?

Nice job!!!

That's a lot of cartridges. I can see why you were concerned about storage. Nice solution.

There is a nice little cartridge holder that is put up for sale on this site every so often that hold 5 cartridges in standard headshells. Its a little pricey, but works, and keeps them safe if you have lost the stylus protector. And the cartridges are already mounted in the headshell for quick changes.

Many thanks to you all for inspiration

the small unit below is the humidor, electronically controlled, filled with distilled water in a sponge.
In the upper part you see the temperature and the humidity – now 53% (it needs time in the beginning). Goes up to 75%.
In front of the single platforms and also in the rear side there is space for the air moving around…
The humidor makes sounds if something is wrong etc.

The door mechanism keeps a firm closing against the rubber blinding.
The carts are stuck in specially constructed aluminum inlays, being able to be moved around in the matching holes.

best @ fun only

Now I can die a happy man. You would think that someone who owns 40 carts, 12 arms, and 5 tables would have solved this issue long ago. Or was that really the point of all this? ;-)