Your right about the weight at 50kg, your tapered mast is easy as per the rules just divide it in half, regarding regattas theres a bit to do before we see one in Aus but if there was a regatta I think it should be open to anything that meets F12 measurement such as Arafura Cadets etc to build numbers, I don't think single equipment would help the cause.
regards


Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576