Help. I am the new owner of a beautiful old Murphy Loom. The looms where I take classes have little wires that snap in and out of the ends of the bars that hold the heddles but my Murphy seems to have folded - very stiff - wire in place that does not move. The heddles look great but the bars need to be cleaned up. I cannot figure out how to get them off short of unscrewing the shaft (which I have no reason to do otherwise. Help!