I'm replacing the 3 way switch that controls the 6 lights in one of the central overhead panels. Prior to 74, the switch was controlled by turning a whimpy little, black plastic shaft. The post-74 models had a steel shaft that accepted a knob over the top. I was sent the wrong switch. (later model 74 switch) I'm not very concerned about model year purity as much as I am durability. Does anyone have any advice on which switch would be better? The one with the black plastic shaft seems more prone to wear but if the one shipped is more durable, I'll make the change.