pardon me for interrupting such a spirited discussion but, it seems to me that in order to get both cameras oriented correctly both cameras would have to rotate on the same center axis... EG:place both cameras at 0,0,0  move first camera 3" to the left the second 3" to the right ...then move their origins back to 0{if possible} and parent either one to the other...

... forgive me if this doesnt make sense i have a simplistic mind  

:O)

Y'all have a great day.