what's that say? every 5min job is a broken bolt away from becoming a 5h nightmare?

not today satan

I fought with those few days ago, too, so I feel you. My decision was to let rear carriers be, as those can be serviced as is. If those have to be took apart, warming it up with gas burnet till it's red hot and opening the bolt after that is the way how shops do it. Another fastlane is to cut those with grinder, but then you need new carriers. After all, you managed to take those off, so congratulations!