My cruising catamaran, Millennium Dragon, was to have a rigid wing sail but I ran out of R&D time. The idea was to simplify sail handling. She now has a hydraulically operated rotating mast and out haul. No mainsheet or vang. The R&D is still underway, at a slower pace. I have built 3 small trimarans (KHSD) and fitted the last one with 2" Harken rudder bearings to hold the wing spar. I am about to start construction on the wing but need to finalize details. The Trimaran configuration allows separation of 2 bearing in the main hull and elimination of side stays. The wing will rotate 360 degrees, angle of attack constant and controlled by tail feathers. The boat is steered under the wing. The beach catamaran configuration would be lighter but would require side stays, a main sheet and eliminate the safety of 360 degree rotation. Keep me posted on how you are doing and any advice conserning wing construction.