It appears that Top Gun is being used to Advertise ARF's now days. Just go to Air World's site and you will see the pictures. The Web site speaks for itself:
Our model, built to the scale of 1:4 using original factory drawings and data, reproduces in detail all the prominant covers, panels, hinge lines, rivets and fasteners. The canopy slides open to the rear in a scale manner allowing an unobstructed view into the complete cockpit interior which includes the side panels, seat, and instrument panel. The retractable landing gear wells and mounting hardpoints are precisely factory pre-installed."
It would take anyone years to do all this from scratch. All you have to do is paint by the numbers. I know there is more to it, but anyone can put an ARF together.