If you go with the 8-1/2 yards, you would cut it into three equal pieces of 102" each. Cutting them wider than the 93" width allows about 4" on both sides, what a long arm quilter requires. Sew the three pices together, selvage to selvage, using at least 1/2" seam, if not a little more. Then my suggestion is to center the middle piece in the middle of the quilt. If you are taking it to a long arm quilter, you might want to ask her if she wants to trim it up on the top and bottom, or wants you to.