Summer Wind is not it either. It starts out in the middle with a pinwheel, but the blades of the pinwheel end up being straight, and go to the end of the block in places. I have four 2.5 X 4.5 pieces snowballed on both ends, and four 2.5 X 6.5 pieces snowballed on one end. This goes together with four background 2.5 X 6.5 pieces and four 2.5 X 2.5 squares. Trouble is, the drawing of the quarter block doesn't match with the drawing of the whole block. I'll try to finish the block today and see what happens.
Thanks so much for your help and concern.