I'm currently using a Joyo Ultimate Drive to drive a Turbo Rat. I love the result, but the tone of the Joyo on its own is a bit too...generic (i.e. I find it lacks character) for my taste. I'm looking for a low/mid-gain overdrive that would give a nice 'kick' to the Rat and sound nice on its own. I know the Phat Phuk is a boost, but I read here that some people had tweaked the internal trimpot until it became more of an overdrive. That's my intention if I finally get one. Finally, I'm wondering whether the Mercy Phuk is more of a high gain overdrive. Any owners who can share their experience?