Beautiful block. I can't wait to give it a try. I saw someone else asked about the thickness and quilting. Three layers and fusible. Sounds like it's going to be tough to quilt thru.
I also have a suggestion. On your second block (the demo one), I think it would look fantastic if you fussy cut the smallest diamonds. I think it would make a great kalidescope (sp) like pattern.
Beautiful! Thanks for sharing. I'm watching for the pp pattern.