Hi all. I have an o'day 28. The plastic spreader boot broke off last weekend, time to replace it. I was planning on going to west marine to buy a rubber boot, but I'm not sure what size to buy. It looks like I may need the large size approx 3". Does this sound correct? Second question: I race in a PHRF series and they have the boat listed as Oday 28+441+SD...does anyone know what that means? Thanks in advanced.