There is a lot of unnecessary travel on the inside of the scooped pocket, when it seems that simply going around and around its interior would be just fine. The design is generated using openSCAD's convex hull operator on several identical oblate spheroids.

If there's anything I can do to the factory file to improve this situation, I'd sure like to know about it.

Simplify3DScreenSnapz009.jpg
SimpleNoFillRight.factory.zip
UnitCardsBox.gcode.zip
UnitCardsBox.stl