I use aluminum pins....cut my own out of stock from the hardware store. Nylon/fiberglass are for use in surf....had one break once and don't trust them. No idea why one would use stainless......more galvanic corrosion and more likely to rip transoms off. Regarding the jib addition, no one has mentioned that you also need a furler. Also, there's no separate fore stay on the stock system....the jib IS the forestay. So you either have to drop mast to remove jib every sail, make some major mods, let jib cook in sun for all it's life (which will only be about 6 months), or get a snorkle. Google Dan Berger in VA Beach VA....he's done the squaretop thing.....even added a hooter.