I just noticed that my upper wheel was leaning yesterday. I, too was gradually shooting to the left. When I first noticed it I thought the limb was ready to fail or something, but then I realized that the cable must have stretched or something so I made some twists to it and used a level to make it inline with the riser. It took a few tries, but now I got just the right amount of twist to get me back on the bull. With only one week till the PA opener, it was a stressful moment to say the least!!!! After this season I' m definitely replacing my 3 yr. old string and cable set!!