Ever since we put the first F14 in the water we have sailed against “standard” Mossies at regatta and club level, and they have never been at all competitive with us, then we recently travelled to Victoria to a “long weekend” regatta and sailed against three cat rigged Mossies WITH spinnakers. The performance of these spinnaker Mossie’s compared to the ones without a kite was completely “chalk and cheese”. The spinnaker improved the overall performance of the Mossies out of all recognition and for the very moderate cost of adding the kite and hardware for this conversion I find any arguments against “going that way” very petty.