I've got kind of a wild hair growing out of my forehead...oh, that's my nose, LOL!, anyway I'm seriously considering installing a TCS CN-GP in a Kato Mikado. The light board for the Mikado is the exact same size as Main board on the CN-GP. I assume the other board has to be used (fitted in the tender for lighting) as it's got 3 wires vs 2. If there were only 2 wires it could be possible that I wouldn't need the second board at if that's the only components on that board are the rear light, but I'm not sure at this point.