Started the initial wiring of the plane. The easiest task to start with is the wiring of the ON-OFF SPDT switches.

I am using the VPX-Pro. The VPX has a number of power pins which provide power to various devices. Each of the power pins is controlled by a circuit breaker which can be configured in the VPX configurator software.
The power pins can be "always on", but can also be controlled by switches. You basically assign a switch to a power pin and determine the link. When the switch is turned on, VPX provides power to the power pin.
When the power drawn exceeds the amount of amperage specified by the circuit breaker, the power pin stops providing power and the "fuse breaks" (but then in a digital way).
Remember that the circuit breaker is there to protect the wiring, not the device itself.

Switches can be wired very easily by connecting the + side of the switch to a switch pin on jumper 2 anywhere between pin 1 and 10. The details are visualised in appendix A3 of the VPX manual.
The GND side of the switch is connected directly to the aircraft GND block on the firewall.

Another side note is that this way of programming the system allows to use lightweight switches. There is no heavy amperage or current running through the switch as it is with an analog system.
With VPX, the switch is nothing more than a signal controlled by a low current signal. The actual distribution of the power is handled by the VPX itself internally.

The image below shows some of the wiring of the first switches.

I also made and additional hole in the F706B lower bulkheads to allow routing the dynon network cables and gps signal cables through the center fuselage into the conduit that runs under the passenger seat.

You can see the transponder antenna and wiring in the image below and the additional hole on the right side of it. I will be installing the dynon network hub vertically on the F728A bellcrank channel later on.