My plan is to trim the top to 70.5" square and then add the narrow blue border to make up the difference in size. I am cutting the blue strips at 2" and they will finish at 1.5". That should add up to - hopefully the right size, grrrrrrrr, my brain is a jumble so I hope I got it right.
I am off to start trimming my quilt top ****nerve-wracking**** and then cut and add my narrow blue borders. If all goes well, fingers crossed, I plan to add the star border as well. :)