There are a lot of mice between my sleeping room ceiling and the attic. I don't want to make use of poison so used your petcap design. Unfortunately you didn't publish the 3dCAD or prt files so I had to cut the holes with a router tool.
I made two of them for now. If the mice are gone, I'll put som LED strips in it
Used Brim otherwise it curls up with the used filament. Semi seethrough Ultimaker filament.