Summary

Remixed my Cable Tie Base so that it can be fixed with a single 6g countersunk screw (e.g. 6g x 5/8"), or an M3 countersunk screw. This is slightly bigger than the previous version (25mm / 1" square), and the base is a little bit thicker to accomodate the countersunk hole. You could scale this up/down slightly in your slicer if required to suit larger or smaller screws.

This is designed to print without supports.