Possible counter pressure bottle filler idea

[labeeratory]

Ok so I'm planning on setting up a bottling station and would like to use three counter pressure fillers. My question is instead of buying three individual units, can I build one using a manifold (not necessarily a co2 manifold). I drew up the general idea I'm thinking (please excuse the crude drawing all I had at the time was pages). I'm sure something is flawed and welcome someone to point it out