Bowser's Executive Line of HO scale locomotives are wonderfully detailed.  We had the pleasure of installing a QSI Revolution U/A sound decoder for one of our customers.  The installation of the decoder was relatively simple although we modified the frame by grinding down an area that was well suited to receive a small oval speaker from Tony's Train Exchange and a matching enclosure.  The QSI decoder is also ready to power the LED lights without any modifications!  We are happy to install decoders for our customers, both DCC with and without sound.  Send us an e-mail or call us for a quote.