Even if this Gustav guy with a great imagination was the first to fly ... He was obviously not intelligent enough to understand the ramifications of said flight and didn't promote it like it should have been. So really his story is worthless.
As the age old saying goes.... "Pics or it didn't happen"
Did I ever tell you guys about the time I invented the computer? Yeah I built that baby in 1969 and even had a snappy name for it "the pornography box". Never took pictures, and I only got it to work once. then some asshole named Blankenbaker came along and got all the credit for the first personal computer. Total bullshit.