The insert will fit everything from the Lockdown Kickstarter, except the following:
The insert fits sleeved cards, and is designed such that the cards can remain in the holders while playing.
Insert will create a small lid lift when also storing the main board (I personally use the neoprene mat, so I am not storing the main board in the box)
The design is made to work well with a 0.6mm nozzle, and printed with 0.3mm layer height (first layer 0.2mm)
Note: Quite filament heavy (~2.3kg of filament needed)
The author hasn't provided the model origin yet.