In 2005 I used birch plywood left from a project for a lensboard (the edges had to be milled down to an appropriate thickness). Made a pinhole from aluminum soda can sidewall, using the classic dimple-and-sand technique to outfit a B&J Press.
Very nicely done! Thanks for sharing. I like your shutter. Looks like you could reasonably get into the fractions of a second with it....again, thanks.