Hi!
I have had time to test the new SLR 560 and 460 front wing. In my spot in summer the top wind is 16-17 knots in gusts, and I sail all the time with Loftsail Skyblade 8.0 sail because the wind is not enough to push the l?mits with smaller sails in downwind.
The 560 is a really allround conditions wing, with a reasonable good perform in light wind and upwind. I use this wing (560-105-210) when the conditions are light (from 8 knots to 13 knots) because it have a great lift make possible a good performance and machine of creating aparent wind. In 10-11 knots I was sailing with a young lighter sailer with IQ foil (900-115-255, and 9 meters sail) and in a normal upwind, I can keep his speed. In cross the wind I'm faster, and in downwind if is not very close to rear wind a little bit faster; not upwind-downwind race(obviously the IQ foil is more efficient). With 10-11 knots I can go to 22-23 knots. When I sail with a friend with f4 slalom foil (720 cm2 front wing) same sail, if the wind is lighter (10-12 knots) we sail at exactly same speed in all directions. If wind is little higher I'm faster. The 575 evo is a very different wing, faster than 560 in high wind but without the low range wind of the 560. The 560 is the big wing for lightwind for 8 and 9 sails. My top speed with this wing is about 25.5 knots, but always change to 460 when the wind is higher than 14 knots, because I love the feeling of the 460.
The 460 wing is a beast. It runs good from 14 knots, but from 16 knots and higher it feels in his conditions. Is usual to arrive more than 27 knots, and I I have overcome my challenge of an average of more than 27 knots in my spot. Less accesible for beginners, nervious and reactive needs wind to go upwind, but in cross the wind and downwind there's no limits. I have a pro who has test the 390 front wing and 175 rear wing, and is only possible to run in a flat water. In his best conditions arrive to 33 knots and a average of 31 knots, but more difficult, with a little chop conditions in Tarifa.
For Autumn I hope arrive to 28 knots, if I find good enough conditions and I can sail with 7.0 Skyblade or 5.9 speedblade. My personal challenger is arrive to 30 knots, I hope one day I can arrive.
Saludos!!