Quick Release post for SLIK tripods

I bought a SLIK tripod many years ago that had a Quick Release post. Works very nicely, fix the post to your camera and you can clip on-and-off with no hassle.
I've got a couple of cameras now, and friends might also feel the need to use the tripod on days out. Extra posts are available, but they aren't cheap. Makey Makey time...

Took a few dimensions, knocked up a quick OpenScad model and bought some brass ¼" BSW grub screws, 5/8" long. I also used some thin foam (about 1mm thick) to cushion the camera base.

I've read that ¼" BSW = ¼" UNC, for those having difficultly sourcing the correct grub screw.