Ask HONDA small engines division if China cares if they copy something. China cloned the 6.5 hp engine, the 11hp engine, and the 13hp engine. An exact copy for 4 years before China was finally made to change the design. Think Harbor freight sold this clone 6.5 for $129 (down to $79.99 on sidewalk sale days) and Honda's retail is $329 for the engine. I can confirm the parts a 100% interchangeable and as reliable as the Honda. Really its kinda sad cause the Chinese don't give 2 hoots about copyrights. Good luck suing them also they don't recognize the rest of the worlds rights and law put into place to help control things like this.
I can also confirm the guy with the Flying Hydro I was one of the first to get the plans and build it before he got mad and pulled it down, then got hired on and designed a few AirHogs RC planes and what not before he got tired of there poo also.