Theo is right about those arms, here's a pic of my Woods Brushbull 60. The thing will chew through a 3" oak tree, but those arms take a beating with the irregular ground around my pond. I broke one this summer. Part of the problem was I had it connected to a quick hitch. I've since learned that's not a good idea because the arms wind up flexing in and out instead of the top link pivoting. Chains solve that problem.
The plotmaster also did a great job on establishing my CRP. I rented it from the local soil & water conservation dept for $25 and used it all day then planted a food plot.
