https://quiltpatterns.s3.amazonaws.c...mond_quilt.pdf
My lattice was 1 1/2 unfinished, my diamonds were about 5x8 point to point unfinished. This tutorial is similar to the one I used. I made it so long ago not sure what I used, but this will get you through how to make the template. Thanks for looking.
Matching the diamonds was a challenge, don't look too close, I will try another one soon, and maybe do better.