The VR1 port - infamous for foiling flashing attempts. As I open up my DS I notice a VR1 and a VR3 on each side of the volume controller. Whatever V stands for I'd assume it's Volume-Related. There is a very tiny metallic screw on top of one of the ports, and it is rotatable. I see it holding nothing in particular so I assume it's probably for internal volume tweaking, much like the GBA's internal contrast tuner. Can anyone tell me what it does and if it's possible to tune something internally to get better volume? I'm tired of barely hearing music on the headphones and enhancing it through software to 400x and ruining the quality.