Nicely done, but I don't understand what you mean by "snowballed" corners. I like the way the blocks interlock, but I know that adds to the work. Is that what you meant?
I see 16 snowballed corners per star. It has nothing to do with the blocks interlocking. 16 blocks with 16 snowballed corners totals 256 which I agree with Judy is a lot! Very pretty quilt and worth the effort.