The standard Nacra 5.5 jib is too big for the F18 rules. You would need a F18 legal jib, spin and get a F18 main and boom to start to be competitive with them. Then add the jib self tacker.

If you could find an older Nacra F18 that had busted hulls, you could buy the entire rig/sails and transfer it to the 5.5, you might save some money over buying a new F18, it that's what you want to do. Or, just keep it and play with it until you decide you want a F18 (or something else), sell it and buy the next toy. <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />