JD, hope that you will do a write up when you install yours. Could of used a duel set up yesterday when I went to start the Jeep and the battery was dead. It was sitting in -30 - 40 degrees for a few weeks though without getting moved.
This thread covers the basics of what I'll be doing. Beowulf already did the Kilby/Odyssey combo ... http://www.expeditionportal.com/forum/threads/73865-Dual-battery-setup