It turned out sew good. I really like it & I'm sure your granddaughter will too.

Here's another web site that does all the math for you, all you have to do is plug in your numbers:

http://www.multi-patch.com/html/diag...calculator.php

Much easier than trying to do the math yourself!
I made a royal mess the first time I tried this, thank fully it was on a scrap piece of fabric, but it's work out fine since then for me.

Great quilt!! I use the diagonal seam for smaller quilts and don't seem to have any problems. I do starch before I cut the diagonal, however, and that seems to keep stretching to a minimum. For larger quilts, I like the wide fabric.

Try fusing a strip of lightweight INTERFACING to the diagonal line before cutting.