Tonight I added the mandatory placard warning passengers that this aircraft is experimental, and not operated to the same safety standards as a commercial flight.
I wasn't happy with the regular placard offerings from SAAA, so I had a custom vinyl lettering decal made up. It was very fiddly to apply, but the time was well spent as it looks great.
I also positioned it just below the secondary EFIS, instead of the usual spot on the map box lid. I figured that it will stand out there better, especially when operating my iPad (which obscures the map box when mounted up).
Warning placard is now in place, just below the secondary EFIS