Do you have lots of fabric left? Normally you really want to make sure that the edge of your quilt is on the straight of grain. Sometimes it's better to ignore some of the rules. I would make additional full size blocks. Stay stitch along the diagonal. Then cut 1/4" away from the stay stitching. The stay stitching will keep the block from stretching, but I would also handle the quilt gently when quilting. The cut off portions can be joined to make additional blocks for another project or added to the backing for interest. Obviously, I have a typo in the pic. It's 1/4" not 14" LOL
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