I heard about them three years ago. By then I figured out that would be the utmost plane to build and of course someone came up with the concept I only dreamt of at the time. I am a 30 years plus Tig welder and I can only admire the professionalism exemplified in this project. Only in America! I would add post heat treatment and get rid of the pedal for amp control if i were to build one myself.
That depends largely on how it is configured when we build it. It seems to perform slightly better than a stock Super Cub but has slightly more interior space than a Cessna 180. If there are any specific specs you would like, let me know!