I found that the original wire clip design kept popping out of the extrusions very easily if you merely touched them by mistake. I altertered the rounded ends of the clip that clips into the the 2020 extrusions and made it more square (see pic) in order for it to clip into the extrusions more securely preventing it from popping our too easily. Maybe not a big deal to most but I am a perfectionist and like it a lot better. I hope that everyone who is as picky as I am likes it.