Ivan was the first person to fly my first ducted fan plane. (a Byron MiG 15) I didn't have the guts to make the first flight and he was nice enough to do it for me. This was in Irving, Texas about 12 years ago with a 40 mph wind.
In the years since, he and Paul always remembered me when they came to Texas.
I think I speak for all who knew him when I say he'll be missed greatly.
Johnny