The kit comes with a premade fiberglass panel/shell. This shell is well done and a good place to start as it is a custom fit to the fuselage. While it also includes a fiberglass panel insert for mounting your avionics, I had my panel laser cut from a sheet of aluminum. The aluminum is stiffer, and I think it’s a better choice as some of the edges are quite narrow.
Once the panel, it’s supports, and the radio stack were installed, it was time to get serious about wiring the avionics, ELT, heaters, oxygen, gear, central warning system, autopilot, etc.