Ben Hall used a slotted wing at the 2007 A class cat champs
"I do know that my boat was the fastest boat downwind in heavy air. In one race I passed 35 boats after rounding the weather mark back in 80th. I passed some boats to leeward, some to weather. It felt like an Indy Race, passing right and left on the track."
Also interesting to see a typical 14m A cat sail weighs 5kg. No they're not made out of mononfilm.......
Buy a Phantom now and get two tyos to play with, the 08 and later the 09...tempting