Creep probably is an issue then. Any of the three or four PTP mentioned will do. Like i said it has to be adjustable. If its not you'll rip the sail in half. If you dont know what your doing you'll probably rip the sail in half any way.

Anti torque rope is what i would use so it can be furled and handled easily. It has relatively low creep too.

Who would've guessed a tri sailor on Catsailor.