There are some excellent Nidavellir coin storage/display solutions on Thingiverse, but I wanted something a bit special. I wanted to be able to have a system that could store the coins safely in the game box then were able to be quickly put on the table without having to load all the coins into the slots to vastly shorten the game's setup time. Additionally, I wanted to put the coins in one long line, with all the cards behind. I find this makes it much easier to take in where each value coin is and what coins have already been taken during the game. During the design I had the idea that the lid could be used to hold the draw piles for the I and II decks and either the respective discard piles or the draw piles for the I and II camp cards from the Thingvellir expansion. The card stands included in the game are prone to tipping so I made sure these were much more stable. It's much less fiddly to load the cards during setup and pick a card out during the game. As the system is modular, you can also set it up with the 3 rows of coins behind each other much like game's original cardboard stand. Finally, if you forgo using the included card holders, you can use these to raise the rows behind other rows, pretty much exactly like the original cardboard stand.

Print one of each of the 8 files. If you turn each half of the lid upside down in your slicer, you won't need any supports when printing. I recommend printing the card and coin stands with 20% infill and the lid with 13% infill to reduce the weight.

The whole thing requires 84 magnets. Each magnet is a 6 mm diameter x 3 mm length cylindrical neodymium magnets. These are readily available online from stores like eBay or AliExpress. When installing the magnets, take extra care to ensure the polarity of the magnets are correct. Insert the magnets into the card and coin stands first, then in the lid pieces last. Double check each magnet before inserting, because making a mistake may require you to reprint the part if you can't get the magnet out easily. On the top and bottom faces of the card and coin stands, opposite corners are the same polarity, whilst adjacent corners have opposite polarity. On the sides of the card and coin stands each end has opposite polarity. Ensure each magnet on corresponding positions of each card or coin stand uses the same polarity. Eg, the top left magnet on each top and bottom face of the card and coin stands should be North. A decent amount of force is required to insert the magnets. They should sit flush or slightly below flush. If you have difficulty installing the magnets, you may need to scrape a bit of the rim of the magnet hole away in case there are any slight overhangs. Most magnets stay in on their own, but due to tolerances in printing, some need a drop of super glue to hold them in place.

EDIT: I have added 3 photos showing the polarity of the magnets for anyone who is struggling with the magnet orientations. I haven't shown every single face. For those faces you can't see, copy the same pattern. Ie, North goes on the left side, or top left and bottom right corners when you view the face. South goes on the right side, or top right and bottom left corners when you view the face. It is super easy to flip magnets when you are inserting them. To help prevent this, use an already inserted magnet as a guide to inserting a magnet into a matching face. After pushing one magnet into a print, I then place another magnet on top of the first magnet then line the print up with another piece that it will connect to, then push those pieces together in order to insert the magnet into the second piece.

After printing, to pack the stands away, there are some single and double triangular markers which help remind you how to assemble it. The last two photos show how the parts are assembled when the whole thing is to be packed away. The bottom layer consists of the 3 card stands. The middle layer consists of the 3 coin stands. Finally the lid is placed on top.

NOTE: This was the first 3D design I made. I'm pretty proud of the design. It wasn't the first thing I ever printed, but it was early on and the quality of the print isn't great. I was having problems with adhesion back then before I switched from glass to a PEI bed. I was going to reprint before uploading, but I prefer to work on new projects. I used eSun silver PLA+ for the card and coin stands and eSun gold PLA+ for the lid. They don't look like gold and silver to me, but they don't look too bad. Of course, you can print with any colour you like.