Thanks, Dave, I read through it all and was reminded why I don't normally read SA! I think the best idea would be to take this concept (free standing carbon wing/sail) and the biplane concept and marry them. You should get the best of both worlds (reduced weight/cost in the rig and beam), simplicity, and more sail area with low CE which works well with no trapeeze. Then you would also not have to take off the tramp to derig.