Eric Pesty has a pedal drive system worth checking out (photos in the blog post below). Almost everyone's system is different. You can't buy a great system, and if you could it wouldn't fit all boats, so lots of innovation.Efficient pedal drives is the name of the game at the moment. They help make enough apparent wind to keep the boats sailing even when the water is barely wrinkled.
Some really cool ones this year, but I didn't take pictures.
Off Campbell river today. My buddy was heading home and saw Eric: