In watching several earlier videos, I noticed that one of the EFISes was the SAME as one of the ones I have in my RVs! It's good to know if I ever need to go supersonic.
The bad news is that the GRT Mini had the "leans" in the earliest video I watched!! I called Greg to find out what was going on. As I recall, they needed to connect something (GPS puck????, Pitot/Static????). In a later video, I noticed that they had a sad face sticker on it. . Finally, for the last cockpit video that I watched, I saw it working correctly. So, I assume now that I am good to go at least Mach 1.11 in the RV!!!
I work in Greensboro NC across from the BOOM Superfactory. It will be the third aircraft prototype and built at GSO. The Questair Venture and Hondajet both were decorated there, and I have seen them both from concept to production. Quite cool.