Insert compatible with with Marvel United, including Tales of Asgard and Rise of the Black Panther expansions. And separately compatible with the Return of the Sinister Six, Guardians of the Galaxy Remix, and Enter the Spider-Verse expansions.
The design provides both efficient storage and improved game play. Many of the trays can be utilised during the game, and they greatly aid set-up and clear-away times.
FS-MUTD is arranged in up to three layers, with an additional tray for seven miniatures on the bottom layer.

The insert includes trays for storing and organising all of the game components as shown here. The card tray is sized so that all cards can be sleeved.
Each of the miniature trays have slots of varying sizes to store each of the differently sized miniatures form the game.

When packing the box, first place the villain dashboards on top of the card tray in the recess provided. Next place the location sheets on top of the large miniatures tray.
Lastly add the rule books and mission guide. This fully fills the box and allows for vertical storage of the game.

The FS-MUTD insert works equally well for the Return of the Sinister Six, Guardians of the Galaxy Remix, and Enter the Spider-Verse Expansions. The insert can be added to one of the three expansion boxes and used to store all of the content together.
Again the insert is arranged in up to three layers and all cards can be sleeved. When used in this way there are less game tokens, so you can either use the additional token trays to give additional storage for the base game tokens, giving you trays for both sides of the table, or simply invert one of the trays as shown to fill the space under the smaller miniature tray.
When packing the expansion box follow the same steps as for the main game, with the villain dashboards and location sheets on top of the trays. Note that the hexagon shaped sinister six dashboard should be placed on top of the rule books as shown.
As in the main game box, this fully fills the box allowing for vertical storage. As the expansion boxes are smaller than the main game box, when the box is fully loaded the lid will lift by 21 mm.
An insert for the Kickstarter Promos Box was also developed. Unfortunately there is just too much content here to make an insert with separate slots viable.
So the only possible solution was large open trays with all the miniatures chucked in together, which was also not desirable. The existing FS-LCG2 insert was tested for medium boxed living card games and it fits well in the Promos box.
The box and plastic trays for the miniatures are added on top. There is some lid lift, but otherwise this is a great way to store and organise your card decks from the expansion, especially if they are sleeved. You even have two small token trays for the new tokens.
When FS-LCG2 is used in this way the box lid will lift by 29 mm. It was considered making a product for The infinity Gauntlet expansion.
However, since it would never be able to incorporate the plastic gauntlet itself, meaning it would always remain in the expansion box, it seemed better to leave the contents of that box in it's own provided plastic insert.
The trays require assembly, which is quick and fun, using ordinary PVA glue. Detailed instructions are included in the package.