Here is one sailing canoe with 2 different rigs – featured recently on the Open Canoe Sailing Group website: http://www.ocsg.org.uk/marketplace/
A lot of thought and craftsmanship has gone into this particular boat. (And so many of the others featured at OCSG.org).
These pics are linked to at their original location, but this may change in the future. Here the are at the time of publishing this post: