Maybe someone can help me with a frustrating problem. I have an old (10-15 years is my guess) Athearn Trainmaster that will run fine on straights, normal curves and grades. However, I have one spot that is a result of bad design on my part, where the track has a grade of about 6% and a curve, all in a space of a few feet. The loco will get part way around the curve and something shorts. The lights that are connected to to power pack will dim and then the circuit breaker shuts down the track area. All other locos, diesel and steam, any number of axles or drivers, any and all brands, will round the curve and pull a train into the upper yard. Not this one loco! Are there any Athearn experts that can help me out. Old Athearns can be noisy, but are usually reliable. This seems to be the exception. Any ideas appreciated. Dave