I bought one of these on ebay and use it with a 9" Forester (or MTR) brush blade, the kind with the chainsaw teeth. I've put about 8 hrs of run time on it so far cutting invasive bush honey suckle, and it has done fantastic. It will spin that heavy blade up in a fraction of a second, and it will maintain speed when making cuts on larger (up to 4") stuff. I did open up the exhaust a bit, but its otherwise stock. The shoulder harness does a great job of supporting the weight of the machine. For the price, this is perfect for what I need.