Simon, I dont think I have read what you wrote about wings earlier. Do you have a link?

Spray, yes. But thats a question of designs. As it is, we get quite a bit of spray and slamming from our aft-beams. With a new design, beams can be raised to avoid this and I am quite sure there will be some creative thinking about wings/spray/drag along the same lines as well.

When going to windward, it's my experience that almost nobody move around the boat to balance on one hull. There is some crew-movement in light winds, but after that most stay put on the windward hull or work on trapeezing (some hiking also perhaps). We did try sailing to windward while we moved about to balance the boat on one hull, but stopped as we were really slow. I guess moving about took to much concentration away from steering and trimming sails. We could not move fast enough to use small puffs either, but had to luff or dump power.