Wouldn't the small square need to be larger than 2 1/4? I'm in a fog too at the moment, but if you used this size, there would be no 1/4" seam allowance at the top. I would be inclined to use at least a 2 1/2" square with the 4 1/2"
[ATTACH=CONFIG]580927[/ATTACH]
The blue line is the cutting line.