The Light-O-Rama Cosmic Color Ribbons were not designed to be shortened or lengthend. You could, in theory, ‘shorten’ a CCR by simply not programming those pixels that you don’t wish to use. 

If you were to lengthen a CCR you would have to cut into the ribbon, which would void the warranty. There are some other technical specifics that you would need to be aware of, which are beyond the scope of this document.

In short, if you try and extend the CCR, you are on your own.