Buy Several
Tim: I agree with R. Palail exactly, and would like to add that I use several of these stops. We call them slug stops. I use one of them to stop the slugs when they you drop the main sail. I also use one above the gooseneck on the boom so that the boom doesn't ever go into the slot in the mast and fall out when you raise the main. I also use one under the gooseneck, so that I can raise the boom when we are not sailing. This greatly helps us get our sail cover on, which is a little on the small side. You may have to file down the side of one of the slug stops to get it into the slot because sometimes they are a tight fitting until you get them into the slot. I even usually keep an extra one in the galley, but that one is now in use because one of them bounced into the water when we were reefing the main this summer. On the subject of reefing, you have to take one of the slugs out and then replace the slug stop. I hope this helps. Until your stops arrive, use a bungie cord to keep the slugs from falling out. Aldo