I have the same Big Muff and I use a one-spot power supply for everything in my pedal board except my HOG. The battery connector has worked great for me for the past two years. The only thing that worries me about it is having the wires get pinched by the housing, since they stick out while the casing is screwed together. I have had one problem with this before, but now I have a completely protected pedal board so the Big Muff hardly moves from where it sits in the case.