Several years ago I came up with a detailed class description and hull rules so that anyone running in the class at the Tunnel Champs or STRA would not get tossed out for an illegal hull. Carl was nice enough to sharpen up my hand drawings and make the illustrations page look good. In fact, I sent a copy of that to a couple of people who were board members at the time. A link for this has been posted on this forum several times.
I will admit it got off on the wrong foot (with the racers) in 2004 when I was allowed to run it in the tunnel class. Should have proposed it as its own class back then. Instead, a lot of people got mad about it.
Simple fact is, it is just a cool specialty class. If a club wants to run it, as long as the engine, racing rules and safety rules are being followed, have fun.
I will say this, my design is a viable option to the pickle fork tunnel, which is what the outboard class has "homolongated' into.