Grounding the instrument voltage regulator

Well, I figured out what was smoking. One of the copper strips on the printed circuit board melted. So, I pulled a gauge cluster from one of my parts cars, and the gauges and circuit board look perfect. I don't think It's ever been out of the car. I also managed to find a couple voltage regulators at the parts store, so tomorrow I'll finish putting everything back together and I'll let you know how it goes. I'm also running a ground lead from the cluster to the dash frame.