The head over heels moment is a product of the height of the center of effort(pushing point) above the drag (of the hulls) of the sails and the force of the sails. As such, the position of the sails fore and aft is irrelevant. Windsurfers tilt the rig for various other reasons: Their arms arn't long enough (the can only get their weight aft by pulling the sail with them) They would rather have lift than de-power, so canting it over makes sense. Canting it over lowers the center of effort
The heavy-ish mast I have raked back sits back past the rear beam at the tip. This does provide a little lift and a lower centre of effort which is not so irrelevant but it pitches weight back meaning I have to get out less to provide righting moment and so makes the boat more stable at speed. Cutting the rig down by 5 feet ( much lower center of effort) also means I have to drag far less useless metal and rag through the air as if you check the boats such as Tornadoes trying for these speeds it is clear they have far too much power and are too busy dumping in gusts to settle to boat properly.
