My own layout. Is wired much the same as RJR just described. A pre existing layout built before DCS. Star wiring maybe the preferred method for good results. That doesn’t mean common buss wiring won’t work. I believe in 12 gauge buss wiring with 14 gauge feeders. Every 3 ft. section of my Gargraves flex is wired with drops. I think neatly done, solid connecting wiring is the key to good results.