thanks to both
we have been centering the traveler, easing the backstay and tensioning the boom vang to flatten the main. we have tried both sizes of genoa, and have had difficulty both in wing on wing and broad reach filling the genoa. we'll try putting the traveler to windward; that would seem to put more body in the main. we are also looking at rig tuning to ease forestay tension.
all advice is much appreciated