The door on my trailer is pretty long 7'6". I had a problem with the wire getting tangled when we put the door up so what I did was lift the door with me and another guy inside. The spring mechanism on my door is a solid bar with a garage door spring on either side with 2 cables welded to the door/Ramp. I pulled on the cable on one side while he looped the cable on the other side. Then he pulled the cable so I could loop my side. I think we did it about 2 times and we were done. since the door was up there was minimal tension on the cable and it only took about 5 min. The best part is almost no effort is needed to lift the heavy *** door now, and NO tools were needed.:Thumbup: