What would I change?
There’s always room for improvement, and one of the fun things when writing a Pilot test report on a kitplane is a little conjecture on how I might do things differently. Here are some observations:
The front seats only have threepoint harnesses, and regular readers will know that I prefer a four- or even five-point restraint system
The back seats only have lap straps, which is acceptable but not ideal
Because gull-wing doors can suck open, I’d recommend a ‘Door Unlatched’ annunciator light, and also ‘Master Warn’ and ‘Master Caution’ lights above the P1’s primary flight display, even though the G3X does provide aural warnings
Toggle switches operate most of the electric systems, but for any aircraft which you must climb in and out of I always recommend rockers – they are just less prone to damage. Alternatively, if I were building a 4, I’d seriously consider moving most – if not all – of the switches to the cabin roof
The choke and cabin heat knobs are identical in shape, colour and movement which is poor ergonomics; they really should be different shapes and colours, as you might intend to turn the cabin heat on and instead get a ‘rich cut’!
The parking brake unit needs to be turned through 180° (strictly speaking, it should be ‘forward to fly’) and the flap control should be aerofoil shaped
There should be a DV panel in the port (P1 side) door
Finally, I’d turn the fuel valve about 45° clockwise, so that the selector points at the selected tank.