Bachmann had the V3.5 sound files blow on V4.0 decoders which has caused, sound problems not synced to the movement problem. Can it be fixed at home , the main problem is moving off before it releases the brakes. I tried changing CV124 setting to 24, not difference, changed the starting voltage to 0 and this worked, but manually running. I will look at a re-blow with better sounds in the future.