I dug a 4ft deep hole for a dry well using my JD 4200 FEL. Encountered 2 or 3 large rocks, but was able to dislodge them and get them in the bucket (partially by hand) to get rid of them. Using bucket in vertical down position and then curling up, you can dig quite a bit deeper than front wheels. This was a bucket finesse project, as opposed to charging at the dirt to load the bucket. I was about to dig the hole by hand, and thought I'd try the JD for the fun of it. Glad I did, and I was amazed what it can do. PS, I'm new to tractoring. Ken