OK so I went and bought a new set of stewart warner gauges ( Fuel, Oil,Volt, and Temp). More money than i have ever paid for a set. Way more. I went to their site hoping for installation info but nothing. What info came with them was pretty skimpy. have several questions I am hoping you ffollkes can help me with. 1) Is the GAUGE completely insulated from the GAUGE HOUSING? It confuses me because on the + and - studs one has a nylon washer between it and the housing and the other does not.