If you look at the top pic, you can see that when the bush hog is lowered the pivoting piece drops. It can't drop much or the pin that holds the top link hits the arms. Because of that it doesn't seem to do much the way it is hooked up. If it pivoted upward, it would have a good bit more movement.

Thank you for the safety tip. We have learned a lot but have a whole lot more to go. I have never thought much about getting hit by debris up on the tractor.