I had a couple of Odyssey's PC680's in the car (meaning one eventually went bad after a long time, then I put in another) before I switched to the little Evo2. They work great in this car, and they're considerably lighter than stock no matter where you put them. TBH, you're getting most of the benefit just putting a PC680 in the stock location. Everything beyond that (relocation and/or smaller and more-expensive battery) is just hyper-optimizing for smaller gains. I mean, I do it, but that doesn't mean sane people should do it
