Big Size PBY Catalina RC Model Maiden Flight : Almost Crash 3 Times!!

I thought this was going to be an easy maiden flight, but I was totally wrong. The RC plane is PBY Catalina with 90 inch wingspan, with 6,2 pounds weight. It made out of 5mm Depron foam and 3mm plywood formers. There's still some part of the plane that needed to be fixed so it can fly normally, but I'm very optimistic that it can fly nicely next week on the next flight test again.