This Raspberry Pi case is for the new Pi 3 A+ which is Wi-Fi only and has just one USB port. This Pi is perfect for providing a remote web management interface to a 3D printer (I use Octoprint). This case is low profile and also features multiple sets of holes to allow Zip ties to be threaded through for easy mounting (I recommend putting the zip ties in before installing the Pi). Also, this case allows the Pi to be snapped in without the need for additional hardware. The opening for the GPIO pins will also accommodate a standard notched 40-pin ribbon cable connector.
Solutech, Yoyi PETG
About the design process...
This is the first Raspberry Pi case where I was able to create the complete CAD model myself. I used the Linux version of FreeCAD, since I run Ubuntu as my primary desktop at home.