There is nothing stopping a F16 sailor sporting a code zero with a straight luff.......you just need to make sure the half girth is 75% of the foot.......therefore if you take 400mm off the luff, you will need to add to the leech.

400mm of extra leech round (roach) is no that much over a 7500mm leech.? <img src="http://www.catsailor.com/forums/images/graemlins/shocked.gif" alt="" />

How deep you have the sail designed will be the key.!! <img src="http://www.catsailor.com/forums/images/graemlins/laugh.gif" alt="" />