I am making one of these units
and have been looking for the Shear-Loc Knobs called for in the instructions. They are only about .15 each BUT come in packages of 100 pcs. Proably more than I need! So I got to thinking that if anyone wanted to make one of these holders I would throw the Shear-Loc Knobs in an enbelope and send them out.
OTOH someone may know where to get one each of the three sizes called for.
Let me know if you are interested.