Making the Ki-Gass primer bracket

Four 0.30 mm holes were drilled to a depth of 2.70 mm in a piece of scrap wood. Each hole is at one vertex of a 1.06 mm square. Four pieces of 0.30 mm rod were then introduced into the holes and pushed down until they hit bottom. A photoetched nickel-silver disc with suitably spaced holes was then slipped over the protruding rods.