I've got a bradco, not sure about the model but 8 1/2' on my 790 john deere, it has been pretty good. I was impressed at how good it actually works, I have been in construction 20 years and I though excavator or go home. I was wrong. It works very well down about 4' beyond that it will do it but its slow. Only problems I've had was one blown fitting, factory defect, got a new one at a local parts house for $15 not worth the warranty hassle, although I am sure my dealer would have fixed it if I asked. Also after 5 years hard use its got a couple of weepy cylinders. I don't baby it and actually I use a frost tooth to dig frozen manure pack in the winter which is hard on any machine. I would give it 5 stars, no complaints here.