To gunrunnerjohn and bmoran4- Thank you for you input! Taking your points into account, and the frustration I have had with understanding how to make command control work for me, I have opted to run in Conventional mode instead. The trains run flawlessly, so I know my track work and wiring are solid. I have spent hours reading the manuals that come with the individual products, as well as trying to install the system over and over again to no effect. I know what the equipment is supposed to do, but it just isn't happening for me. And I am OK with that because operating the ZWL throttles is fun in itself. So- thank you again for your time and responses.