So Google is cracking down on the obvious PBN's, looking through threads on this very site some of the services that were previously effective have the OP running because they've been deindex'd. Up until now I've very much been a white hat only guy. Building clean, well optimized websites and building high-authority links. Paying the proper entities (such as Yahoo Biz directories, Business.com etc) and it's gotten me pretty far. However, I'm really interesting in building a reliable, reusable resource for link building. I'm aware it will take time, money and effort up front to do, but for my business I see it as a worthwhile investment. So, for the BHW pro's out there, how do you build a successful PBN and keep the footprint to virtually 0? Is there some sort of "guide" that exists or reference material I can read? I'm pretty technically savvy and already have an idea as to what I need to do, but I don't want to waste time and money poking around.