It's been a minute since I've checked your thread. Man you're doing all kinds of awesome things.
That lightweight battery is cheap and awesome! And, if anybody is wondering, pretty much any o'reilly/autozone/pep boys or parts store have something that interchanges with it. Only thing is, it's like $40 more ($99.99 at O'Reilly). I'm glad somebody did the research on that for me, I've been using a lawn mower battery in my corolla for the past year, and it does alright but I want the engine bay to look a little nicer and an AGM battery will be MUCH better than what I'm using.