After seeing the Stick-vice on you tube I wanted one. At first I thought is was a strange rather useless thing but it turned out to be very handy. You can use it to hold a pcb level under a microscope, use it on both sides, work while resting your wrists/hands on the bench for more stability.
But I wanted to use it for double layer boards repair too. So I needed place for longer board and changable legs on both sides so I can flip it including big caps etc. I made one from brass and steel. The legs are normal standoffs. You can get them in lots of sizes. I used M3 threaded versions.
For the rest, the pictures say it all.