U are an idiot and so am I. The part not ever listed is the plastic bearing strip that fits inside the first wall attached slide. Taking a complete unit apart if not the Surgeon General they most always get broken - especial the old and brittle - Just try and order a replacement. Not likely as they are seldom mentioned in any of the sites offering replacement parts. So what is the name. I call em a bearing slip - strip - slider - watchamacallit - do u know the part name and how to order - if so you failed to mention.