You can still buy the two slug wire rope halyards for the Hobie 16 from Hobie. You can probably even get away with just cleating off the halyard and not using the slug. I've seen plenty of boats come back in where the people couldn't figure out how to use the fork in the first place. Sure you reduce the load on the mast, but has anyone heard of a mast breaking because you didn't use the slug?

The plastic luff track in the comp tip will not retain the bolt rope in the reefed position. The leech tension pulls the sail out of the track starting at the head. At the top the halyard provides some forward pull, but I believe all the new boats come with 9" of an aluminum track extrusion at the top. Our older boats don't have that, we even have two masts without comp tips. You can make it work by adding another of the 9" aluminum extrusion tracks at the point where the head will be when reefed and cut the plastic track to fit above and below. Hobie did that with the 21 SC. I've taught a couple of classes on windy days where the reefed boats made it easier to teach.

John