What about taking your thoughts in a different direction: If you put a black Ameraucana Roo over your flock, he'd make BSL with any barred female. And, the resulting BSL, depending on their breed would produce green or blue eggs. I haven't played with the red sex linkage yet. My EE roo (my avatar pic) is producing some beautiful sex links. And I'm getting buff, light olive, aqua, blue, and brown eggs from the pullets he's produced. I couldn't be happier with the egg basket he's providing me with! Of course all of the pullets weren't sex linked, but interestingly enough, there was only one chick produced that I couldn't gender id. b/c they were sex linked, or their leg/comb color was consistent.