Summary

A wobble-free support for Halloween tombstone yard decorations. Fits onto 1/2" pvc pipe. Adjust the PIPE_D constant in the OpenSCAD file to generate versions for different sizes of pipe.

To use:

1. Cut a length of 1/2" pvc pipe that's about 10cm more than the distance from the base of your tombstone to its middle.
2. Insert the pipe into the support base (the base is the part with four fins). You will have to push hard initially.
3. Orient the attachment surface so that the narrow end of the teeth inside the tube point down the pipe (that is, so that they point in the direction you will be pushing the attachment surface as you push it onto the pipe).
4. Push the attachment surface onto the pipe.
5. Use duct-tape to tape the attachment surface to the tombstone.
6. Insert the base into your yard.