Okay I am going there... Sport 60 is just that sport class; rules apply just like all the sports classes. So you are very limited to what you can do to the hull. James there are so many modern and past scales that have recessed transoms and rear shoes and so on. Heck there is two type of rigger boats along with a four point boat you can build. Your options are endless with scale class, just saying. Also James if you want to design such a radical hydro like David then there is a class for you to go in. It is called Hydro A,B,C,D,E,and F hydro classes. The class is open to do what ever you want. Go crazy, go nuts, it just has to be a hydroplane by definition. It is all in your rule book look it up. Heck if you want to you can build a twin or more engine boat. If you are just out to have fun and run for the fun, then heck go crazy go nuts build what ever as long as you are happy and having fun. But what we do not need in racing is another class of boat that already has been established so that one or two people have something to do or try to sell. The rules are there for you to look at. It is easy to build to them and still have fun. I can think of NAMBA class and no offence to anyone that is NAMBA but you have 2 sport 40 classes to satisfy one manufacture and his rigger type boat (which would be a hydro class?) that I think in my personnel opinion is flat nuts. I am not NAMBA and do not have a vote or say with them and I do think they have some great rules. Okay sorry got up on my soap box again everyone please I mean NO offence and wish to have a good debate on this topic.