When I made my Lone Star the instructor told us to make all your diamond star points, then sew two together, another two together and so on until you have 4 stacks of 2. Then sew 2+2 together, another 2+2 together, then you have 2 stacks of 4. then press well being careful not to stretch fabrics, then sew the two sections together and you only have one seam to contend with. Mine turned out fine using this method. Hope it works for you. Good luck. By the way I think yours is beautiful. Can't wait til it's done.
Patti