I am making a batik star quilt (not Carpenter's Star this time) using Hoffman's Batik Crackers (10" squares) It works out beautifully IF I make my HST diagonal seams .5 cm instead of 1/4". That's the width of my regular foot. This way, each square is in 8 HSTs, 4" finished size each. When I am done, I will have 4 extra squares after a twin quilt for DGD. I usually prefer NOT to use precuts, but I am glad I did for this quilt.
I agree with Alisonquilts about sorting the squares. I have 2 light and 2 dark segments in each of my stars.