I have a 2017 Heartland Mallard M312 and the cables for the slide are rubbing against the frame wall. Is this normal? Does anyone else have this issue? I had it in the shop and they told me that they contacted Heartland and that Heartland told them that it was normal and no correction was needed. I could have sworn that I read somewhere on one of the forums or something that there was an adjustment for this and it could indeed be fixed. Otherwise it will eventually lead to the cables being worn and frayed. Any thoughts?