Greenie.
I want to give a thanks shout out to you on your recycling methods. After seeing your "bedframe" portion of the build, it gave me the idea to save a bedframe from one of the kids baby beds that we were getting rid of (bed, not the kid :)). I have it pre cut, and ready for use on the Colt build. with the riveted corners, etc, it will be VERY easy to whip up a battery tray!
Thanks for the idea!