Opps, Sonic, you are correct. I was thinking 717 but typed in 720. There's lots of differences including cabin, wings, etc between the 707 and the original Dash 80/717. I've never forgot that picture of Tex Johnson (?) aileron rolling the Dash 80 at (I think) the hyroplane races. Boeing had literally bet the company on that airplane and the Boeing president nearly had a seizure watching it.