Stepping up from the ESU LokSound Select decoder, I have now successfully completed my first LokSound v4.0 install. The difference between the Select and v4 decoders is that, with v4, you can load your own sounds and home made sound projects. I've wanted to convert my Kato RDC to sound, but the lack of a ready-to-use Select file had held me back. It was while perusing the SBS4DCC site that I saw that Bryan had made two custom v4 files of RDCs, and has them (and other projects) available for download. The actual installation is very straight forward. I cannibalized the existing Digitrax DN143K2 decoder, reusing the front and rear light boards. I simply added my own white and yellow wires to each board, and connected them to the respective white and yellow wires from the decoder. Track pickup was soldered to the brass contact strips, and the motor wires to the motor tabs below the seats. No frame modifications necessary, though I did take a couple seats out to help the decoder sit flat to the floor. Soberton 8x12mm speaker in a Keystone Details Shapeways enclosure. 3 150uF 20V tantalum caps round out the install. I did modify Bryan's file a bit, changing the horn to use the WP's ubiquitous Nathan M5
