If your going to drill parts, make sure you try it on something old 1st because if you think its shit, just put the new one back on. If it isnt drilled to start with, why bother trying to save 4 grams. If you want lightness, tyres, frame, fork are the things you want light. Don't go all out and buy Ti products either because it weighs more than Al, it just has better strength properties than Al that's all 12lbs sounds abit tooooo light Especially for a stock (if it was that is )