That cutter should last a lifetime. Nice.
One thing I love about the Woods Brush Bull is the large access panel in the top for changing blades. That would really make blade changes easier.
I have an older BB60 that's been trouble free. Decided to clean up the blades last year and had a go at loosening the fasteners. Used a 2x4 between the cross piece the blades bolt to and the deck to keep the rotor from spinning. Needed a 3/4" drive breaker bar with a 6' section of 2x2 square pipe as a cheater to break the threads loose. Be prepared for a workout. I put some anti-seize on the threads at reassembly so next time it shouldn't be so exciting. That's a very nice cutter, and as Pappy says - should last a lifetime with regular maintenance.I'm hoping to actually get to change the blades. My old hog always flew apart before I dulled them