Got a thing very similar to pic related and while I Iove it and it cuts great when it does, it just keeps eating through blades like there's no tomorrow. I'm around just over 100 cuts and I'm already on my 5th blade. They keep getting fatigue cracks and break soon after. Tried several from different sources and none made much difference. I use recommended speed, I don't gorilla smash the machine into the workpiece either. The only thing resembling tension adjustment I could fine is a pair of sp…