I had a 30', fixed keel sloop with a long boom. weather helm was ugly.
raked the mast as far forward as my back stay would allow, added some weight in the bilge forward of the mast. Helped a bunch. Eazing the main also helped.
I sailed her from Walton Creek to Ocean City NJ and lashing the tiller made my solo sail tolerable. Felt like popeye with my oversized forearms