I just got in my CZ70 that I ordered this weekend and it appears to never have been issued. It looks perfect and came with a number matching box, test fire target, and shoulder holster. I was wondering how far I should tear it apart to clean all the grease on it. This is my first surplus pistol that hasn't already been cleaned by someone else, so I wasn't sure what all is required for the initial cleaning. Also, does anybody have any tips to disassemble the magazine?