The first sweater I made 20yrs ago is too tight on the cast on edge of the sleeve. I read the how to make a sweater shorter by putting in two life lines. If I just picked up stitches three rows up on a needle do I just cut one stitch at the cast on edge and try to pick it out from there. I don't have extra yarn the same color so I thought I would take three rows out and put it on a larger needle and bind off loose. Will it work?