From a Seahorse article on the A-Cat worlds

Hall’s 29ft wing measured in at slightly less than the class maximum of 150ft2, and weighed in heavier than standard at 52lb. However,when Hall weighed everything he took off when fitting the wing, standard rig, plus sail, battens, mainsheet system and so on, he found the comparable figure was some 46lb. Hall’s boat is still at rule minimum and still carries correctors.
A standard A-Cat rig has traveller, mainsheet, outhaul, downhaul, rotation, over-rotation and diamond controls. There are only four controls for the slotted wing. Hall’s wing has an upper and a lower element, each with a twist control. The wing has four controls: a 2:1 mainsheet, camber control (that adjusts flap angle from 0 to 35 degrees), twist for the main element and twist for the flap element. The wing sheets in particularly easily around the leeward
mark when Hall can trim on with a single pull.