When you are stitching the diamond tips, you should stop 1/4" from
end, take a couple backstitches. Then I sew the center diamonds in groups of
2, then sew the 2 into group of four. Then carefully pin the center and sew
from center to one edge, and again from center to other outer edge.
There is an excellent book on making Lone Star quilts by Blanche Young, I
believe. An older book, but has been most helpful to me.