I've been nosing around for the past few days and read more than a few very informative threads. See: General concensus seems to be that Magic Keys 2 is the most reliable utility available. However, I have a newer version that has the little metal clip next to the hinge. This seems to be a recurring problem with many late models. I'm inclined to try out the Twist Tool, as it seems to be the most flexible. I would like to buy Magic Keys 2 though, because the comments are much more positive. I'm just wondering what the safer bet would be with a SCPH-77001... On another note, how do these things work? Is the sensor near the hinge just there to verify that a disc is inserted before starting the laser?