You might try to frame each square with a neutral color, sewing from the back of the block to follow close enough to just miss your points. Then, when all the squares are framed, measure and trim to the same size. then, you either have a
double sash between all the blocks, or you can sash with a whole different color. I think the tiny size difference between each of the blocks with points will not really be noticed that way, but all your points will show.