One thing I can say nice about Rottendog is they fixed my Congo AV board for free. I was not the original purchaser and had no idea how old the board was but they still took it in. I tried finding an original but that was nearly impossible. I later replaced the mpu with a Rottendog when the original bit the dust from too much corrosion. I still had some issues with the Rottendog mpu but I believe some of that was related to a short issue I was having. It was also sensitive to what cables I used. I had all kinds of problems with that game but had no issues once I got those board issues resolved.