That's my reason for pounding on the downhaul in light air, to keep the leech from hooking and keeping a continual shape. Softer battens would also help, but I'm not a huge fan of dropping a main on the water unless it is going to stay down. Singlehanded its a frickin' pain in the butt to pull it up, and keep the boat more or less in the wind.
You should try that with beach wheels still tied under the hulls.
