Thanks, Y'all!
I have over 200 of them made, no 2 alike.
Her freezer paper method is so easy, and matching points and setting in curves is foolproof.
It does take more time than machine peicing in some ways, if the pieces are large.
But the pieces for these diamonds (I call them "diamond dust!" lol) are so small that hand sewing them is faster than doing it by machine, and is waaay more accurate.
I should be ashamed to have let this project get shuffled aside. And I am!