cardboard screw cap

Tried with this model https://makerworld.com/en/models/99426-small-cardboard-screwWorks fine, need to work on rounding corners.Currently not viable for makedo, they have a smoother profile and require more tolerance.The ideas is loosely connected to https://www.make.do/products/scru-dot-wild-things which the kids showed me to complete their kits.