Loops I designed for my longboard windsurf, as it didn't have a net originally. Decent as wall net mounts for RV's too. Provided file is for a <5mm rope, but feel free to tweak the Fusion file to best suit your needs.

Recomended(tested) material is Prusament PETG, 0.15 Structural preset is good enough, no brims/supports needed.

Attach using contact glue(chemoprene) or superglue, depending on surface to be mounted to. Base is flexible, but heat can be used to shape for a better fit to curved surfaces.