I have a Mahindra tractor and 8' land pride bush hog. It's been on and off 8-10 times but I always had somebody who knows what they're doing. Today I can get the 2 sides on and move it up and down. Can get the top rod also easily. Having a **** of a time getting the grooves to line up on the center piece. Is there a trick to this? Tried hooking it up first, last, doesn't seem to matter.