@Natho, i,m close to 100kg, so the different isnt a few pies, but rather half the bakery

, but I know an guy who is 65kg and loves the 1110. He normally rides the W800 so his only complaint was that he needed to relearn how to turn due to its wingspan.

I don,t prone or Supfoil but when I saw a review of the Art1099 winging it dis sound exactly like the 1110.
With the 399 it feels really fast and slippery. the 425 ads a bit more drag but a lot more stability and at this moment I prefer that over the extra speed. you just need a bit of shimming to fit the the 425 on the kite stab, but that is mainly my (lack of) skills coming short.
How to shim: I cut some out of 2 layers of a frequent flyer card that has been useless the last 2 years

,glued the 2 layers together and drilled holes in it. works great :)