I agree with George above. It was RJR that pointed this out to me a while back (I don't always see the obvious). Actually, even with star wiring, all your common rails are tied together and form a bus. They are not isolated like the center rail. Even though I used a pair of wires (hot & common) to each one of my blocks, the common rails still form a common bus and it all works just fine. I just don't have the separate, specific common bus wire as George describes. IMO, the method George describes above should be just fine.
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