I'm new to Aristeia, but just built a foam-core insert for the core box that holds the base game, several expansions, and even includes a magnetized box for holding the miniatures in place - and for attaching colored bases for the teams. It is decidedly low-budget but it is nicely functional. https://www.boardgamegeek.com/filepage/188506/aristeia-foam-core-insert-plans (In this instance I also took some 1" diameter wood dowel and cut some pillars for temporary walls and obstacles, which really helps with line-of-sight and immersion. I'll have to 3D print some better ones - and actually paint my minis very soon!) PS - if anybody in the Minneapolis area wants to play, let me know!