I've just done a quick bit of research and there are approimately 28 various types of cats currently being sold and raced in the UK. 14 of these are 5m long or shorter, 3 of these are specifically targeted at junior, youth sailors. Therefore, we have 11 Classes aimed at the lighter crews. If the manufacturers hadn't been so keen to set up their own one design classes and had opted for say three formula classes there would still have been an element of competition between them as there is between Nacra et al. The sailors would have also have benefited from the bigger classes and the associated friendships which are formed which can only be good for sailing as a whole. Unfortunately this hasn't been the case and to the new comer the choice of Catamaran or Dinghy is a bit of a mine field.