i use 52 wide kinetic slalom in 16/30 knots and 58 wide[5.5kg] in around 12/16 knots both with 5.0 vapor. i have 5.8rs6 but prefer light feel of 5m. i do plane in this light wind with 5m perhaps not as much as with 5.8. i also own 7.7 severne cr2 which i use with fanatic falcon 75 wide,8kg and 41fin . i just bought this sail last week and to my surprise it starts to plane in around 7 /8 knots, fully powered up in 10knots.checked these wind speeds on seabreeze. com.au so i think what i am saying is correct.can hold 5m in 20/25 and just survive [max downhaul] in 25/30.lightweight equip boards, base, mast is one secret along with heaps negative outhaul.i was planning the other day not quite as early as guy on 11.0m. he had a good bit more downhaul than me. he could not believe i was planning with 7.7m.