A new set of sails (from a good sailmaker) will always be faster than an old set. After a few seasons a set of sails will get blown out and will create less lift and more sideways momentom due to the sail stretching and the max draft moving further aft.

We had a new set of sails made for our Tornado (see attached picture) and have just updated to a new cut spinnaker - higher profile, more roach which is alot quicker than the previous cut.

We get a couple of seasons out of our main and jib (self tacker - dose not flog) and get a new kite anually.

Our Sails are from Olympic Sails in Sydney, Australia and are one of if not the best Tornado sails you can get - used by Bundock and Forbes, current World Tornado Champions. Gary Geitz from Olympic Sails has worked closely with Bundy / Forbes and Mike Fletcher (coach) to develop and refine the sail cut and produce world winning sails.