My replacement cart showed up today, and so far it's working pretty great. Puzzle Bobble won't boot up, but that's my only issue so far. I'm a little nervous to tinker with the soft dip settings to adjust difficulty after that last cart was all glitchy... anyone mess with those? I'm playing on an MVS-1FS in a cabinet. I mainly bought it as an arcade stand-in for my AES collection, as I own about 30 games for it, and most were on this cart.