we had a 8560, the engine hp was what limited the capacity of the machine. We had the governor adjusted to kick in sooner, that helped alot. That engine is the same as in dodge trucks I think they are putting out more hp in the trucks. So you would think that a upgrade would be available. we traded ours on a 8570 had the engine hp jacked to 260, now thats a machine with capacity. the 8560 we had was very reliable,when we traded, it had over 3200 hours