What's wrong with wing on wing?
When we are constrained by a channel, or just feel like going dead down wind, we are reasonably stable with our main on one side, and our asymetric spinnaker on the other. Sailing without your mainsail reduces support for the mast, by the way.I have only heard of flying two sails from the headstay track while cruising in the trade winds. I think it takes enough time to set up to be impractical for a leg of a few hours. If the wind shifts, you have to drop one of the sails, of course. Our 110 flies OK without a pole, but you will need a pole for the 140. Without a pole, they loop out front, and make a lousy running sail.DavidLady Lillie