Hi Sam, <br>Technically you wouldn't be "Hobie 17 Class Legal" but, so what. <br>I assume you are talking about leaving the jib off and just using the mainsail with the boomlet. <br>Your boat should actually be a little slower because of the additional weight of the sport speader pole and jib hardware. <br>The mast is the same on all H 17's but early sports had a smaller mainsail. <br>Nowadays all H 17's cpme from the factory with "Sport" on the hulls and the sails are identical. <br>You could get a new forestay and bridle, boom, sail(?), and remove the jib blocks and race "Class" legal. <br> <br>Are you coming to Cat Fest at Lake Norman this weekend? <br>E-mail me. <br> <br>See Ya, <br>Sam Evans<br><br>