STL files to print replica pool matt for an NSD neck. Modeled after actual pool matting used on my first NSD build, which was not authentic Heronrib/Heronair. Just the closest equivalent I could find at the time. Designed to glue into a 3D printed set of neck rings. 3 levels are designed smooth where they will mate to the neck rings to provide more surface for gluing. You may need to trim here and there to fit your neck rings.