As a long-time quilt maker, I would advise any newbie to just aim for an accurate 1/4 in seam. It's hard enough to make an accurate 1/4 in. seam with out worrying about the "scant". When you are adept at 1/4 In. seams, then think about the scant if your blocks aren't accurate. Happy quilting, don't sweat about the "scant things".