Summary I just added a back parameter to this, without a back it's two parts that seperate. I like printing it in two colors. The original brain work was done by JustinSDK https://www.thingiverse.com/thing:1185425 Print Settings Printer Brand: Ultimaker Printer: Ultimaker Original Rafts: No Supports: No Notes: I can get a really nice print if I choose wall_thickness=2xNozzle_Size and print with zero infill.