My Sterling SUB bass has a problem. The truss rod wheel seems to have lost all the tension and it just spins, like it's not connected to the truss rod at all. Before I start taking off the neck to do further investigation, I thought I would ask if anyone has ever had this problem before? The bass is about a year old and I have adjusted the truss rod successfully a few times, but when I went to do it today, this problem appeared.