Does anyone have any experience using a rotating grapple on a mini to medium size excavator? Bobcat makes model 30 and model 40. I have been hard pressed to find other manufactures who offer this type of attachment for mini's. My purpose: I currently set rock with a bucket/thumb combo with an 18,000 lb. machine and have seen some 200-300 series machines with this unit and it seems to be a whole lot faster in production.