My 3260 has four stainless steel cables attached to the outside of the bedroom slide. Two in fron, and two on the back side. At fiirst they were all reasonably tite. Now one of the cables, on the drivers side bottom is not really tight at all. It actually sags in the middle. The slide still seems to work fine, but should I be concerned that one of the four cables is slack now? I am still under warranty so I could still take it in for service.