Thought I'd show my install -- my first sound and light job for any loco. I retained the factory light board for plug-in convenience of the LM-S3, with the board's protruding pegs clipped off. I wired a pair of shortened iPhone 4s speakers in series, for greater amplitude, mounted on .030 styrene super-glued to the chassis towers. I got the speakers from Kaylee Zheng of Tom's Trains in Connecticut (
www.tomstrains.com). The lights are Miniatronics YeloGlo LEDs, shrouded with shrink tubing, mounted near the stock lightbars with the tube extension clipped off. I use masking tape to hold things down, easier to manipulate than Kapton tape.