Hi guys, I'm about to sit down to try and mod my PS2 with a friend (have the Crystal Pro 2.0 chip), but I'm having trouble finding out *exactly* which version I have, for the sake of the wire diagrams. I have a silver slimline and I know it's version 15, but the code is SCPH-77001ss. Everywhere I look online seems to suggest there should be an 'a' or 'b' after the numbers to be able to determine the version, however. Can anybody advise? Thanks in advance!