I've modified the files from the items I printed pictured to make some improvements.
The discard boxes can be optional I printed four of them to fill out the box. the box spacer is also optional. Figured fill the box out so everything is tight. if the game gets expansions I can change the insert to fit everything.
The insert is designed around 0.3 layers. makes a bit rough print but it's an insert.
I also have an insert for super motherload if interested
-Edit 9/10/17: I've added versions of the card box's to hold sleeved cards. had a couple requests
-EDIT 2-15-18: Thank you drumtyger for delicately pointing out my dumb spelling mistake. I corrected the files
you might get by with 10 infill. it will be a bit rougher but will save some time and material.
recommend 0.3 layers