I got a Kato SD90MAC about a month and a half ago, didn't really use it as I was getting ready to move. I just finished my extension of my main line (now about 100') and started to run the SD90MAC. But it not running all the well, the lights flickers and and studdles and when it hit the 11" turn it comes to a dead stop. I'd expect a loco needing a good cleaning to act this way, but not a new Kato. I'm going to take it apart for cleaning tomorrow. Any ideas on this??