Nintendo Switch Cartridge Holder for Dock / Stand - 12 slot and 3 Micro SD Card Holders.
V2 - I had the original design backwards but have corrected that. I also altered the height of the tiers as before they just weren't high enough to be able to view the cartridges behind each other.
There are a few designs on here but I decided to remix the best one I found. I added additional slots for games and an additional spot for Micro SD Cards.