Sorry for your difficulties. I made my surrounding neutrals oversized, so where I needed a little extra length on a boarder side, I ripped out and used some of that extra seam allowance, and spread the amount over many of the block. When it was perfect, I trimmed them all to 1/4". I know this solution requires planning ahead, and it may not work for you, but let us know how you worked it out. This problem comes up a lot on our quilts..... Jane