One of the first quilts I made was from Eleanor Burns Radiant Star book. She goes step by steps thru how best to sew the strips together, and the important steps with sewing the the large diamonds and the background inserts.
The number of fabrics usually has bearing on how many diamonds are in one side. EB had 5 diamonds and I have made a Broken Star with 7 diamonds. My only hint that I came up with was to do a life size drawing on cardboard of the diamond. Then you can compare each diamond segment and make any corrections before sewing them together. You really have to be so precise with each step otherwise you won't have perfect points. Good Luck