I actually went out and purchased some aluminum stock for making the computer control valve for my Monotype.
That’s a piece of 1″ aluminum square bar which will make the mouthpiece that fits against the air holes in the caster’s paper tower, and some ¼″ thick aluminum plate which the valves will mount on and which will have a labyrinth of grooves to direct the compressed air from the correct valve port to the correct port on the caster.
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