I've a small BH/
B7610 combo. My eventual purpose, if I ever get retired and moved, was to use it to learn and also build narrow trails on my land. I've about 300+ acres in Ms of timberland, and 75 in Vt.
But until then I play with it on my little suburban lot in Va. I've attempted to dig out 4 stumps in Va. The first one I documented here
http://www.tractorbynet.com/forums/kubota-owning-operating/147380-my-first-stump.html
The next two were relatively small 8" pines, came out like greased lightning.
The last was a 30" plus maple with main lateral roots up to 12", I dug a 4' deep hole around it and it had big roots going down deep into heavy clay. It won.
Then to make matters worse, after I filled it in, thought I packed it down, and left it to sit for 2 months it bit me again. As I went to level the area around it I started sinking in, when I went to get out the front tire was about hub deep and came up against one of the 12" roots and I almost buried the little tractor. Now if I had had the BH on I could of lifted my self out maybe