Some time ago I saw an ad for a hydraulic top link that did not attach to the tractor’s hydraulic system. It has a hose that comes off the cylinder to a control mounted on the tractor. To adjust it, you lift the 3 Pt. hitch all the way up and when you let it down you hold the control open till the blade (or whatever is attached) is at the angle you want then let go of the control. I have googled till I cannot think of think of any other way to describe it and have come up with nothing. Does anyone know the name of the outfit that makes this item?