I sometimes use one on my skidsteer that I bought when I had a
m7060.
A few things I have learned to do to improve the uses of this attachment are:
1. Grab the tree up high and clamp down tight. Pull down and curl out to snap off the top of the tree. (20ft tree can be cut in half makes smaller burn piles).
2. For 3+ inch hardwoods first close the jaws and use the implement like a spade to pull the top soil off root system and cut part of the roots. (significantly reduces dirt pulled up with the tree and increases the size of tree that I can easily dislodge)
3. For smaller than 3in first spread the jaw and drag the open jaw across the ground and pinch closed once clear of the tree. (disturbs less soil and the pinch cuts roots on tractor side of tree making it easy to push the tree forward and lift to remove it)
4. For larger pines that you can't just lift out of the ground use the closed jaw as a spade to make a hole behind the tree and then push the tree over snapping the tap root at the depth of the hole.
5. For small sapplings < 2in grab the first one pull it up move to next one spread jaw drive forward grab it and pull. Rinse and repeat till too much in jaw to easily work with before backing up and dumping to the side.
6. Anything much larger than 5 to 6 inches then this is the wrong tool. I switch to my fixed hoe (Dipper stick on a skid steer plate). I can push over 12in trees no problem by grubbing the roots all the way around the tree and then pushing it. I doubt most tractor loader arms could handle the stresses of the hoe though.
7. A tree shear down in the dirt would probably be a better choice for most trees over 3inches. Come back through with a multi shank subsoiler to clear the roots.
8. Don't use it to pull posts you plan to reuse. Posts will be crushed no matter how careful you are. Maybe you could add a pressure relief valve set to really low to allow the use without crushing the posts. Maybe like 200-300 psi. 2500psi of a tractor will crush posts of all types pretty good. However it does makes quick work to crush concrete off the bottom of metal posts. Do it over a tarp to ease cleanup.