First, what year is your 3055RL? I have a 08 model and the bedroom slide is different from the previous models. Mine has suddenly started tearing the black cover of the bottom of the slide. And I can see no reason for it. But if you bring the slide in about 3/4 of the way, and depending on which side you found the roller you should be able to see on the lip where the slide goes out where the roller was mounted. I have not checked into the mounting any further, because both of mine are still mounted and have no screws sticking up to tear the cover. So I can see no reason why it should be tearing the cover on the bottome of my slide. I have not gotten any further due to shoulder surgery. But it looks like you would have to remove mattress and the complete cover that the mattress rest on to get to a position that you could see and remount the roller. I am going to check on mine further, but it will be several weeks before I can handle the labor. I may contact dealer, my unit is only 13 months old.