nanoVNA SAA-V2 TPU case

This is a simple overmold style case for the SAA-V2 version of the nanoVNA (with the SMA connectors on top instead of on the side, and with the smaller display). Getting the nanoVNA in the case can be challenging but is doable if you warm up the print first and take your time, and the result is a fairly protective enclosure to prevent against drops and very light moisture. STL and FreeCAD 1.0.0 project file are both included.