It was my first time. I had no idea other than reading the container. And ..originally I only thought I wanted one pod, hence why the others were added a smidge after. I got a spare piece, trimmed...cut ...sanded...fit... checked...taped. Then laid a couple pieces of glass on to start making it rigid. Went from there in whatever direction seemed to be right.
One thing to keep in mind. An LCD gauge like an aeroforce does not like to sit in the direct summer sun on a dash while you are at work. When you flip the car on, it's tough to read until it cools a bit. Never hurt by it..but you could tell the heat kept the display from working perfectly when it was turned on.