not a problem. for questions like these, i recommend checking out the wikidot. It was a fantastic source for the first game, and it's currently under construction for this one, but theres still a lot of solid info (including scattered zone guides and boss strats). The weapons and armor developments are a little empty, give it time for more people to toy with that and im sure itll fill right up :)
http://darksouls.wikidot.com/ --- I am the Master of the Obvious! Tremble in fear of my power to know what you already know! PSN: rslfan
Idk about an Estoc, but i doubt it. Estocs are piercing swords. Furysword is made purely from Curved last time i checked. --- "Because on top of the boat, Snake could harness the power of SUNLIGHT!!!!!!" - RandomAssassin's explanation for Snakes Win|| PSN: touma8080
It does required Demon Titanite to upgrade though, and there is a limited amount per playthrough. Each piece is dropped by a Titanite Demon (the big purple guys that are missing one leg) or acquired from Sparkly the Crow. There might be some in Great Hollow or dropped by lizards, but there is still only a limited supply so be sure to save some if you're going for the sword. I used all mine on something else without even realizing this. --- Someday, someone will best me. But it won't be today, and it won't be you.