Z-stepper motor mount upgrade for Geeetech Prusa i3 acrylic

Had a fun build and the printer works great .... except .... my student who was building the printer snapped the prongs off the z-axis motor mount. Not sure how that happened, except the design was fundamentally weak with only 2 axis of support (it's acrylic plate). So we designed a z-axis motor mount with a full 3 axis of support, printed on a different 3d printer, and finished our build with the printer already upgraded!

Uploaded the *.stl for printing, and for redesign the source file from