I just acquired a 1995 laser which is in great shape. But I have read a lot about maststep problems so I'm cautious and curious. If the maststep appears to be in good shape is there really a need to buy and drop in a stainless steel wear plate? Currently in the very bottom of my maststep I can see what appears to be a ring of shiny metal surrounding a circle of a non-shiny substance. I assume the shiny stuff is not steel since a magnet is not attracted to it. Any advice out there?