Anyone on the list have a Zonophone front mount THUMB SCREW which holds the tone arm support mount to the bedplate? The THUMB SCREW is 1/4-28 thread and has a knurled head with a slot on top. I tried McMasters Carr for a interim step but everything has a plastic head in that small thread size. If nothing turns up I'll see about Wyatt's making possible one.... Thanks Eric Boyles Omaha, NE