A few days back, as part of our series of posts for First-Time Fifteeners, we ran an item on the use of twinning lines.
David Williamson has kindly sent in this extra tip:-
In most conditions running square, we actually spring the windward twinner approx. 2 feet from the cleat and set the leeward to match. The kite still flys balanced and square while remaining quite powerfull. The benefit is that gybing requires no movement of either twinner. While the crew smoothly gybes the pole, it is very easy for the helm to fly the kite (hopefully without collapsing, aided by the twinners controling both clews). This makes re-acting to windshifts and the presence of other boats a lot smoother and easier.