Are you saying to bet P after every B that appears in the shoe otr only the B's that appear on line 1?
You just to stop betting if Banker goes to 3 string wait again for banker to appear then bet player . You should have 3 separate MM for this play combined above system.
Remember you can play higher unit if already have profits or already self funded . for the meantime stick to minimum bet. Play with their Money and use your time to get extra cash for gasoline.