They work. It makes it a one man one min operation. I had them on my small kabota, 4450s, 8200s and 8320s. If it gets tight and the implement won’t come off the hitch just raise an inch, lower it back dow until the middle rock arm gets loose and either lengthen it or shorten it depending on the situation. Almost every time it’s lengthen it. Reason for it is all equipment is designed to run level and sometimes you have to adjust that arm to get things level.Guess I better try it then.