Chris W. - Chris O. can hopefully chime in on this, but I think moving the jib cleat out further is a good idea providing you don't go out too far. I'm guessing the wind and sheeting is more important to sail shape than the position of your cleat. In light winds having the cleat out further will definitely give you more of that boomed out genoa affect.
As far as speed goes... it is quite possible that the BSD sails are more efficient, but, I don't think you can compare a canoe or Kreuger to the MKII. They are simply faster hulled boats. Unfortunately.
I've noticed and been trying to keep an eye on the participants in the Everglades Challenge and similar races. As seaworthy as our boats are, they are never participants in these races (please prove me wrong here) and I have to imagine it's because of hull speed.
Two years ago I had one of Mark's canoes at the Wooden Canoe Heritage Assoc. gathering up in the Adirondacks. A friend and I were out for a paddle in it. We stopped to change paddling positions when another canoe came upon us. The two paddlers in the other boat stopped paddling so we could exchange some pleasantries and the speed at which they passed us, gliding, was jaw dropping for me.
Our boats have a lot of great qualities. Much to my chagrin, I don't think speed is one of them.
Here's a really interesting thread about Howard Rice, he rounded Cape Horn sailing an Aerius 1, and his sailing canoe Sylph. Howard joins in and contributes a lot to this thread and it's a pretty interesting read. I'd love to catch up with Rice at a Wooden Boat event and pick his brain a little about sailing the folders. I'm hoping to go to the Wooden Boat show in RI later this month... it would be great to see him there. Roberto, you'll like this rig.
http://forum.woodenboat.com/showthread.php?130739-Sylph-Prof-Howard-Rice-s-sailing-canoeI'm hoping the boss here will give me the OK for a BSD rig myself. If not, it's back to the drawing board with rigging my own BOSS outfit... which is not a terrible thing. I really like the red sail that is in the above thread. It's a bit of a cross between the BSD sail and our Klepper S4s. I like the depth of the sail much better than the tall narrow BSDs, and look at those two huge reefing points... nice! Really, this is more of a typical batwing that you see on a lot of sailing canoes. I think, this is the sail design we should be looking to get with out folders.
Chris T. - It does seem like the sleek narrow tube would be more efficient than the BOSS. But it's a lot more rig with two akas. I was originally looking at a thread about inflating a BOSS ama while out on the water. Unfortunately I cannot find it now. It was somewhere on the Water Tribe site I'm pretty sure, and there was some discussion on how this could be done. The long and short of it was that it's very difficult and help from another boat was the best option.
The idea of the long amas with dual chambers entered the discussion at some point. Trying to find that thread I found this, click on the inflatable outrigger link:
http://www.jpwinc.com/pages/photo-outriggers.htmld