I need to replace the traveler fairleads for my Vanguard 2005 or 2006 Laser (sail #184395). Is should be simple, but it seems that there are 2 sizes of fairleads available, 23mm or 26mm. As best I can measure without removing the fairleads my spacing is 26mm, but looking at various websites it lists the Vanguard part # as 80-21-0 with replacement Laser Performance #91321. To make it more confusing, some websites say it's 23mm and others say its 26mm! I can go for aluminum or plastic. Current ones are grey/black and probably aluminum. Please help tell me which part number I need! I don't want to take the old ones off until new ones are in hand. Also, do I need to use silicone (or other) sealant when screwing the new ones in? THanks!