Test run of a SD40-2 from USA TRAINS. The engine is drived by a Zimo MX69-V decoder and sounded by a Phoenix big soun P8 board. All the light have been changed and are now high power warm white LED. The decoder is really great and have smooth low speed and great programmable functions. The sound board with a 2.5″ speaker is very powerfull and and have great features like rev up and down diesel to simulate free rolling or grade opperations.