You can bring your own boat, but it has to have a Hobie sail and stock rudders.
But doesnt that go against the class rules? ie IWCA?
Why have them compete if they cant use there own set of rules?
It sounds like someone would make an F16 event, and specify you can race in the event, but only TWO up, and the ONE ups wont be able to compete, ie going against class rules.
