You know, one of the things that annoys me is the BOM rule. When I was 13 and starting to compete, I had to compete against "Daddy-built" airplanes, when I had no choice but to build my own. That was some 50+ years ago, when "ARF" was the way her dog "Sandy" addressed "Little Orphan Annie."
Now, combat planes are made mostly on the shores of the Ural river. If I were commissioner of the PGA tour, I would insist that pro golfers built their own golf clubs, in the tradition of Old Tom Morris.
ARFs are OK, but I don't see the point of competing if you don't do some construction on the model you use. It is a dual sport -- inventive design and construction, then pilot skill.
Just wrote this to make sure you know I am an old curmudgeon. Feel free to debate. I still remember the "Daddy-Built" planes.
Larry Fulwider