I knocked this up in SketchUp to hold a the gauges for my Exomotive Exocet, replacing the original gauge pod that had come with the kit. This pod is somewhat smaller which I needed to fit under the car's new windshield and was designed to hold a single 4.5" SpeedHut gauge (GPS Speedo/Tacho) and two 2 1/16th" gauges. There are also two 1/2" in holes for a couple of indicator lamps/switches. (Needed for hazard switch and alternator light.)
In my instrument cluster, I'm using a PerfectTuning CAN gauge to display water temp, oil temp, oil pressure, and air fuel ratio (or boost) in one of the 2 1/16th" gauge holes and the other 2 1/16th" gauge hole holds the fuel level gauge.
Unfortunately the part is too big for me to print on my own hardware so I had to farm it out to somebody else to print the prototype for me. I'll post photos of that when it comes in.