The 2nd Edition of The DCS O Gauge Companion is an extensive 215-page guide for operating the MTH DCS Digital Command System. The book includes 64 charts and illustrations, all intended to educate the reader on the basic and advanced features and functions of DCS. Reviewed by Jim Barrett in OGR's January 2010 issue, the original edition was hailed as an "indispensable tool" that "should be in the hands of every command control operator". The book...