The Framers Forum

I need a new measuring scale - the one on the squaring arm. I've looked at the usual suppliers online but without success. The one on the arm measures 2mm short leading to the occasions when I fail to add the 2mm with predictable results. Whilst on the subject of the squaring arm, (the most awful lash up from a reputable manufacturer), does anyone know how to keep this square because mine seems to drift around at will. I remember with fondness the squaring arm on the old C & H Advantage which was a thing of simplicity and beauty.