Bushing for 1/2" Knockout v2 with Built-in Strain-Relief

This is a bit of a remix of a previous design - this one incorporates a zip-tie strain relief for bundling wires before passing through the bushing. Also added was the 15mm hex-type bolt pattern. I printed the male piece with the strain relief portion facing down and used the Cura function to build support material only from the bed to avoid having supports placed in the zip-tie cutout.