hi to you all, I do own a nacra 18 square equipped with a spinnaker and a square top mainsail with an inter 20 carbon mast. The boat is great but I have a hard time with my pointing ability. I am 250 pounds; to go as fast as the F18, I have to give them at least 5-7 degrees upwind. Getting the leeward hull nose deep in the water help a bit, but that is not enough. What should I look as far as tuning. I have been sailing for 15 years and this is my third boat but the very first unirig. So I guess I am missing something; anyone can help me.