I totally blew this one, Felix - Thanks for calling me on it. I was thinking left and right stacks where the three front row players are pulled all the way to one sideline or the other. I wasn't thinking about using a 3-person receive pattern (among others that are legal) where the LF and CF pull up close to the net near the left sideline, the LB, CB and RF are the primary passers and the RB is stuck in the far back corner because she can't pass worth a hoot!
Oh, well! I tried to make it simple, but I guess there really ISN'T a simple way to see IA except to get the experience to recognize it.