That upgrade button is hard as Chinese arithmetic to put back together, if the  metal piece is bent slightly. I mean it is HARD to get it back correct. FYI Don't disassemble unless necessary, and I don't see any reason to take a PS3break apart? I'm just saying!
Quoting PS3break, 'Upgradable yes!" No not "yes" Only PS3Break's update release they posted on there website, upgraded it and allowed disk-less play. If it aint broke don't fix it. If you want to flash the newest payloads you will have to invest in a new dongle or mod chip. And I'm just being honest. Good luck