it depends how bid the porject is -- a wall hanging, yes, I would undo (Idon't like the word rip) a couple inches and redo. If it was a big quilt, I might not. It also depends on how different the colors were -- light vs dark would show up a lot more. Some of the points on a quilt I'm doing now got cut off a little -- I left them. I had made the blocks several years ago.
BTW what is a junior member?? does that come after new member or is it your age?? LOL