This mesh is helpful for mounting a Pi3 Model B standard case to the back of an Epson EB-PU1008B wire housing shroud. This should work for flat cases that fit Pi Model B+ / Pi 2 / Pi 3 similar the one for sale on the Adafruit site (product ID 2253). This should print with no supports at 0.2mm layer height. This was designed in Autodesk Fusion 360.
The version (v1) in the images doesn't fit as well as the mesh version (v2) uploaded to this site. I just didn't want to waste the plastic for the reprint. One of the photos (the last in sequence) shows the partial print of the hook for the better fit. I have uploaded the better fit design to this site (v2).
The author marked this model as their own original creation.