I need advice from the experienced guys here. I have built a PBN of 15 domains during the past few months. I will called this PBN1. I am using PBN1 for just one site, I will call it site1. I tried to block ahrefs and majestic but my PBN has been discovered by both. I have another site, called site2. This site is gray hat and it used to rank at #1. Around November of 2013, it dropped to bottom of page 1 and it's been sitting there ever since. I have tried high PR blog comments on it and it won't move. Right now I am in a situation where I am being pushed by people to rank site2 by next month. There is no time to build another PBN because finding the right domains takes forever. I have no choice but to use PBN1. But here is the problem. if someone reports PBN1, both sites site1 and site2 will go down. If I had a separate PBN for site2, it would be less risky because if one PBN gets reported, the other is still safe. So yeah, that's my dilemma and I dont know what to do. Any ideas are appreciated.