I was given an Ibanez trem by a friend who's had it in his closet for who knows how long. Can't get a pic up right now, but it has the long string lock screws, a bit of a whale tail, push in arm and the block just says, "Ibanez EDGE" with a teeny Japan stamp under it. It looks as if the knife edges could maybe slide out for replacement. The studs are the locking type. Anyone have a clue about which model this is and if it's any good? I'll get some pics up later if needed. I just don't have any experience with Ibanez hardware besides knowing that they change their trems up a lot. Thanks.