what about your jib halyard tension? if you can't point, maybe your jib luff is sagging. extra jib halyard tension is needed to keep the jib luff wire loaded upwind when the wind builds. what looks good on the beach may not be enough out in a 15- 18kn breeze sailing hard on the wind. if the forestay becomes taught going upwind the jib luff will sag and you wont be able to point.