Have you tried the disappearing 9P quilt? There is also a disappearing 4P that I like
http://www.quiltingboard.com/t-40144-1.htm
http://www.quiltingboard.com/t-92447-1.htm This one takes the DP4 one more step for a different block.
http://www.quiltingboard.com/t-68180-1.htm