Mine has a minor tweak to the grapple arm. It is barely noticeable and will not affect function. I won't try to straighten it, unless it gets worse. No stones yet, just heavy brush work.
JD Quick Attach mounting was poorly made. I had to grind off almost a third of one of the pins and 10% off the other make it fit, and the position of the holes for the hitch pins lets the whole unit slap way more than it should. If I had it to do over, I would have asked for a discount, got it without any mount and welded a set of JD plates on myself.