Ok, got it.
Yea, I have one like that I bought from brushy mountain. I actually have it full at the moment. It has a entrance on each side.
That's why on the one I made, 10 bays,I wonder if the queens will be able to find the same entrance since there are other entrance on same side of box.
That same guy has a excellent grafting video. I think Apis has posted it on the forum.