Free 3D Printer Design from Peak Electronics
Print both parts and screw together with small self-tapping screws.
The STL file (at 1:1 scale) and the Sketch-up file (at 10:1 scale) are packaged in the same zip file.
A modified design is here that requires less filament.
These files are provided by Peak Electronics free of charge and without any warranty.
Not for resale.