If old, the cloth-fabric can easily “catch” on the end, as you slide the rail on and along. Just be careful and go slowly. May need to retry this step several times to get the rail full on.

This step will require a large vocabulary of cusswords. I nearly broke mine, getting it out, as the clips refused to bend inward. This is one of those “looks easier than it is” kind of things. But… it’s very-correct on what needs to happen, here. :)

Tirzah, this is EXACTLY what I needed. My shades were slightly different (ie. the lock mechanism), but this gave me the general idea (and specifics in most areas) that helped me know how to tackle this! :) It wasn’t easy (took me 1.5 hours), but… it’s DONE! Thanks again!! :D Kurt