Atik EFW2 Carousel storage

Internal carousels of the Atik EFW2 filter wheel can be changed. I have 2 carousels, one with 7 filter positions, like the one in the pictures, and another with 9 for smaller filters. Carousels are all the same size. When I exchange them, I need a place to safely store the one not in use and protect it from dust.

The parts close very tightly.