The fingers do not pivot on a rod. The fulcrum is a knife-edge and the fingers have a ">" shape that sits on the knife-edge. This results in almost no friction. The "blade" is some alloy or aluminium (too light and too worn to be steel) and 3.5in x 1in x 1/10th in thick. I don't think the thickness is critical; 2.5mm or even 3mm (with the edge filed a bit sharper at the edge) would do.
Does anyone have any ideas what material I need to search for? I'm not familiar with aluminium grades. I even considered 3mm brass
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Any thoughts would be helpful, from a PSG tech. or a metal workers angle.
One other thought occurred to me, I wondered if the Fender 800 or 2000 used the same knife - it would be logical that an existing part would be used in the new model.