I had to make these clips, because two of the original ones got lost. In the images the original one is black and the new one is orange. 

• It's probably better to use the “classic” perimeter generator (expert menu,  “print settings:layers and perimeters:perimeter generator:Classic”, “Druckeinstellungen:Schichten und Umfänge:Umfangsgenerator:Klassisch”);  “Arachne” won't fill the gap in the middle of the 4 layers in this model, where layers aren't connected
• I had to use supports
• used 3 vertical layers to enhance stability
• 40% infill
• printed using PETG, PLA will be too brittle

Version 2, 14.Mai 2023: 

• made the lower opening smaller, because the original design kept getting off when the composter walls were not perfectly aligned.