remember stronger the wind smaller the sail, smaller the sail further back in the mast track, further back in the mast track more'bounce'. but you guys already knew that

a bigger board will go over and bounce over the chop, where as a smaller literage board will go 'through' 80kgs, using a 7.5m sail must be 12-15 knots then??
i live in WA the biggest sail and board i comfortably use is a 6.5, or a 7.3 for speed sailing, and a 110 litre board, and im a solid 100kgs, usually i would sail a 98l board and a 5.4 or 5.8m sail, suits me from freeride to freestyle and occasional wave sail