Update 2020-03-11 - I have completed a completely new design for storing both the base game and the New Discoveries expansion, which can be found at https://www.thingiverse.com/thing:4216156. I will leave this version online for anyone needing just the base game

This is my custom board game insert for the game Underwater Cities. I designed this using the Rio Grande Games edition, after having problems with one of the other inserts on Thingiverse being too tall for my game box. More on that below. I'm always welcome to constructive criticism, or suggestions for improvement. Feel free to comment!

A note on box size. I attempted to print another insert from Thingiverse, and discovered that it was too tall to fit into my box. I suspect that the Delicious Games edition of the game has a taller box than the Rio Grande Games edition. I do not have a copy of the DG edition to measure, so if someone wants to measure and confirm dimensions for me, I would appreciate it. For transparency sake, the box measurements I took from the RGG edition are 313mm long, 224mm wide and 70mm deep

I started off with the upgraded bits from https://www.thingiverse.com/thing:3575642. I've printed the resources and submarines, and can confirm they all fit into this design. The other upgraded bits should fit as well. I did not design for the use of sleeved cards, as I typically do not use sleeves. The cards in this game are fairly flimsy though, so I may revisit that down the road (once I'm able to get the expansion)

As with all of my designs so far, I've designed it so the insert is flush with the lid with all components in place. I had one small hiccup with the shake test, as the game board does not completely cover the top of the boxes. I am going to look at putting some lips on the boxes to repair that. For now, I'm posting it as is, and I will update once I have time to revisit it. For printing, follow along with the screenshot I have posted in the pictures. It will tell you how many of each STL to print, along with approx cost and time.