Just my opinion:

Based on the images I have access to, the FA-40 and the SA-43 are are similar, but entirely different. The fuselage has an entirely different configuration. The engine housings and wing configurations are also completely different, as are hardpoint configurations. The similarities that I see are confined to the cockpit design and the nose winglets, both of which are somewhat common in rear-wing configuration aircraft.

So, while the FA-40 could be considered a cousin to the SA-43, to call it a rip-off or trademark infringement is rude, crass, and totally uncalled for. It is, in my studied opinion, a unique aircraft.

Studied opinion, you say? Yes, studied opinion. My grandfather was an Aeronautical Engineer...one of the best in the business. EVERY U.S. fighter you see take to the sky has some of my grandfather's work in it, from as early as the P-38 Lightning all the way up to the F-22, on which he was used as a consultant. The front-sweep wing configuration was originally designed by him, while working for Lockheed, if I remember correctly. I've been taught the principles of Aeronautics since I was about eight, and the only reason I didn't follow my grandfather's profession was because I didn't care for the amount of school involved.

There's nothing wrong with raising questions, or pointing out similarities. But a modicum of tact and respect usually helps. You showed neither.

And Pam, please convey to Spook and THK that my grandfather would have been impressed. ;-)