The entire airframe and powerplant was re-designed. It's nothing like the original
Sort of taking a Corvette and transforming into a Ferrari.
Just takes a ton of money and engineers to make stuff happen. Wonder what the FAA was thinking when they granted license? I think it's a super airplane and a one off.
Never get tired of seeing cool airplanes. Got an up close view building them for the US Navy working for Grumman back in the day.