Gentlemen Bought this Fortress and the truss rod nut just spins. It won't tighten or come off. I watch the video twice (from Warwick). The rod won't lift and pull out as easy as the video shows. Like it's stuck in there. It's all greasy below the nut as well. I can see the square thing below the nut. Needle nose pliers and my vice like grip will not pull this thing out. Any suggestions. Thanks to all.