A ball grid array package comprises a substrate having a first surface and a second surface, a chip, an insulating material, and a solder ball. The method caters to dynamic clients wherein a client can leave or join an ongoing collaboration session as long as there is always at least one client presentremaining in the collaboration session. Opposite sides of the flow divider define a lower wall of each lower outlet, and a recessed channel is provided in each of the opposite sides of the flow divider so as to produce fluid flow which closely follows the shape of the lower outlets. A pair of torsion springs surround each restricting boundary and interface with each valve plate returning them to a parallel position when fluid pressure is terminated.