I've followed this from a 'lurker' standpoint since last December since we have a 2014 Montana HC. Our main slide has always been the 'problem child' though not to the point of deflection and failure. The other three slides work and sound just fine. This main slide has shrieked, jerked and groaned while operating. I did a cable adjustment along with a full lube and have described it here and in the Maintenance forum (
http://www.keystonerv.org/forums/showthread.php?t=24643). I am of the opinion that since our sink counter is in the way of easy access, the Keystone 'mechanic' in charge of that slide did a poor installation and got lazy. It also has a heavy sofa bed and dinette.There are QC stickers on each end but those come on a sheet and can go on without any real work. Yes, ours was big time misadjusted and as of Wednesday, worked well and quiet. I am still concerned about future weld failure though as I have no way to inspect that nor do I have any aluminum mig welding equipment - yet!!