RE: funtana x 50
Man I hate to disagree. I don't want to sound like a stinker but..............The F40 and the F50X have the same airfoil. When the planes were both redesigned the F100X got a new airfoil. The F50X did not. I have them both in my shop. They are the same. I looked at the Horizon site. I do not see on the F50X page where it says anything about a thinner airfoil. If it does it's a mistake.
Have a great day,
david