Goal here is like the original zipper, but you instead want to free up the 5 (3 in the stack) to shoot off under for an easy break side look. Note that it helps to push the stack slightly to the force side for this play.
3 and 4 just want to push their guys far enough to the force side to clear them out. These need to be *hard* cuts to get their man to feel pressure to respond and turn their hips. If they can keep their heads in the lane then this play can blow up fast.
Now 5 can shoot off slightly to the break side of the field. Not too much, so that the throw can stay flat, but enough to let him have continuation looks.
Provide quick outlet looks for him.