John340 said..
What are the physical changes compared to the Gen 2?

only have the 4.2 Wave in both Gen2 and Gen3, so i did a shape comparison overlaying the sails (didn't weigh them as it's kinda pointless).
from what i can tell, apart from the larger window, the physical differences are minimal:
the luff sleeve is a centimetre or so wider above the boom cutout and the clew grommet has been lowered by ~2cm.

rigging is a bit different. seems to need a touch less downhaul. the area below the boom has notably more shape, with the foot batten overlapping the boom a bit more.
have not sailed it yet…

ptsf1111 said..
If I remember correctly, the video linked above said there are no shape changes in the newest version. Just some material changes.

Hi, Regarding the Gen 3 wave sail I tested at the Lake, it’s a completely different animal compared to the Gen 1 and Gen 2. The most noticeable change is the handling: the center of effort feels locked in the middle, much more centered than before. It also has this incredible, out of the ordinary lightness in the hands I used it in both light and strong wind, and it just feels super balanced the whole time.
The 4.7 requires a bit more attention when it comes to trim. It uses a 370 mast with a 30cm extension, but you need to downhaul it to no more than 29cm as indicated. This leaves some space between the extension pulley and the sail's tack pulley. The outhaul adjustment on the boom also has a wider range to play with.

Yes, but that's on "regular construction" sails, I believe, and not the 3Di technology...?

Recently North windsurfing sails have changed their construction. The front sections of the sail are 3Di but the back edge (leech) is regular film, when I say regular its still a high tech material but from a roll of cloth rather than custom panels. This is because the more shaped area of the sail is better with their 3Di process and the back edge which is flat can be made from regular cloth, this cuts costs and probably production times too. But they are still making full cloth sails.

Apparently not, You can buy full 3Di models but I think they are offering a more budget model with the back edge in normal cloth. Its all a bit hit and miss with information etc so things could change.