I also drew up a trimaran sailing rig for Larsboat called "Trilars" which is sold separately. It is pretty much a clamp on rig except for the small mast step and partner. Here a photo of a model of Trilars taken at last years Texas messabout:

Then he built what they call down there a "Charlars" shown here with me behind the wheel at the Conroe, Texas messabout in 2002:

It's different from the Trilars. The main hull is per the Larsboat blueprint but built without the deck. I thought the rudder and leeboard were just like the Trilars print. The sail is a large balanced lug instead of a sharpie sprit. The floats are triangular in cross section instead of flat bottomed as on the Trilars, and I'm pretty sure the Charlars is wider than the Trilars which I drew narrow enough to trailer without disassembly. There wasn't much wind that day but I got a little sailing in with the Charlars and it seemed fine with the potential of being wicked fast. My only thought was that it was fast and stable enough (it was stable as a dock) that in rough water it might spear a wave and ought to have the fuller deck, something I think the paddling Larsboat can get by without in most cases.

This is Jeff Blunck's Trilars - it's closer to the actual plans.