Myself, I decided in 2014 to build an AAF bike which to me is special construction. I am building my own frame, lacing my own wheels, welding every joint and bracket. To me that means special construction, unlike slapping a giant swing arm on a modified metric or otherwise frame. I'm a purist at heart and want to do a ground up build, besides I want to slipstream the air as much as possible ,so doing my own thing gives me the ability to do so. Sorry if I offended anyone, just my take on things.