I'm just about done with the repair.
I removed most rivets from the mid skin also and then realized I probably just needed to remove the rivets from the top of the mid skin. That would have removed the bend and I may have been able to slide the inboard skin under.
But it's just about done so i'm happy. In anticipation of making this repair I bought one of the rivet removal tools (like this one
That saved a ton of time and worked really well. I can safely say I didn't have a mess up a single rivet hole.