RE: Scale Gauges.
One trick that I use is to make scaled down copies of gauges out of a car/boat catalog such as JC Whitney. This way you can get any type of gauge you want. If you have a copy of the real dash you can scale these down also. I tend to go overboard and light my gauges. I use brass tubing for the bezel, use the brass tubing as a die cutter, also use transparences cut out the same way for the glass look in front of the gauge (With the brass tubing) and then mount a LED bulb behind it. (You can use yellow, red or a whole bunch of other colors for the back lighting)