cheshirecatman, the hulls have been measured and are parralel. I never had a look at the rudders being in line, I will check that out next weekend. Toe in is about 1/16".
I am not sure about the mainsail matching the mast. I have seen some f18 guys hoisting the main out of the track, putting the boat on the side,then sheeting in and making sure the curve of the sail would match the mast curve. I have done such a test but I felt I would had to put a lot of prebend on the mast to get a good match and therefore resulting in a flatter mainsail loosing the power that I desperately need in light air. May be my understanding is wrong, or the procedure to chek the match is wrong. please let me know.
mast rotation: although I did play quite a bit with the angle, I would not say that I can feel a lot of difference. Would there be possible to install some telltales somewhere to help me to find that sweet spot.