Replacement base for 3D Robotics GPS mount. The bottom is thicker than the original so it doesn't crack when you tighten the screws. Center hole is for a 4 mm mast.

Update: I've added a new stl file with supports around the neck for increased strength.

Printed in ABS on Ultimaker 2 at 0.2 mm layer height with 20% infill.

This does not fold like the original. I eliminated that feature as it was difficult to keep the mast perfectly vertical.