In the construction of my leg vice, by the grace of the cosmos I came into possession of this huge wood screw. I estimate it to be about 100 years old; it looks like it's seen enough action to have earned a few purple hearts and a postgraduate degree. But the requisite nut, that component needed to turn rotational force into amplified lateral force, was nowhere to be found. I had the option of making the complimentary nut on a wood lathe, but I also have access to a CNC router. I could machine a nut to precise dimensions and, if I'm careful, I can do it right the first time, wasting no wood.
"Pass me the calipers" I said.
I make all my wood nuts at TechShop