by MixedGears
Rafts:
No
Supports:
Yes
Resolution:
0.2
Infill:
20 %
Notes:
Print with 3 perimeters
I closed all holes in Meshmixer.
Imported in Fusion 360 scaled added Duplo connectors.
The produced .stl file had a minor mistake, I fixed it with NetFabb web service.
Source files are a little sloppy, don't take them too seriously if you will explore them.