Uploaded a short video of a LaBelle Box car built around the SoundTraxx Sound Car decoder. Mounted to roof and created a sound-chamber to force the sound out the drilled holes between the trusses. This is much louder than before and places the sound right at the truck level.
https://www.youtube.com/watch?v=xYt8Omz8bqg&feature=youtu.be
The keep alive works very well, runs 20+ seconds after power is cut. My stock of trucks are not conductive so test on rails will have to wait until I can pick some up.
Thanks Cameron