Direction flow marking is a great idea, though I once made a couple hundred dollars just because I was the first of four installers who could envision how the wire had been run. The first three didn't step back and try to imagine how the wire had been run when the walls were open. Once I solved one, the other five or six rooms were totally simple as they were routed the same way.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
