Not after quilting, but I'm rather notorious for cutting/piecing/sewing on borders and then taking them off or trimming them down. They are (mostly) out of my stash now, but there have been many long skinny pieces of fabric given to others!
Your quilt/your happy place. You can decide at the last minute to trim it off if you are using an edge to edge type quilting design, or you can design a pattern to fit in the border and keep it larger.
Is going to be a great project, looking forward to seeing it as it progresses.