The first model I came across was this weak design: https://thangs.com/designer/endolux/3d-model/Gridfinity%20Bambu%20X1C%20Nozzles.stl-306832
… which was fatally flawed as it was too shallow and lacked storage for related parts.
Luka's design was much better, but lacked some key features, so I fixed it! The nozzles come with 2 M3x14 screws, a silicone sock, and thermal compound. There's plenty of room in Luka's design to fit all that… so I remixed it and came up with this. Without a place to keep the screws, socks, and goop, they will just get lost. Not a problem anymore!
Also, I included a lid, which is shown in Luka's design but not one of the files… I am guessing that is because it already existed… I hope. I included the Gridfinity 1x1 lid by user “ame” for completeness. https://www.printables.com/model/178413-gridfinity-1x1-lid
I hope ame's lid fits, I am printing it now to test fit.
The author remixed this model.