What is the best storage for cartridges?

Brf - depends on the number of carts you are using. In my case with about 40 carts using on 12 arms installed on five TTs I sometimes change carts frequently and sometimes not. So we may talk about a storage box on the long run, maybe for up to 30 carts.

best & fun only

I decided to build a storage case which can be used as a humidor optional. will show the final result in about two weeks. Thanks again for all the valuable hints. Stay tuned

best @ fun only

today the Bavarian Humdior has seen the light.
I put two images on my page. the humdor is the small unit below...

best & fun only

Nice job!!!

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