Low-Profile PCB holder(2 parts) oh and yeah a rubber band

I do most of my assembly under a microscope, so I like the holder to be as low profile as possible. A good friend made me a wooden one years ago, so I adapted it to the 3D printing world.

The picture is of the prototype. I doubled the guide rods to allow for bigger PC boards in the published STL file. My friend used a bolt, nut and a spring to hold the plates together, so I incorporated the holes needed in the design, but a rubber band will work in a pinch. I had a 1/4-20 bolt, but not a good