[purpurite]

op, or anyone else, have you ever seen GXP bottom bracket cups that were different ODs? One was very much 44mm and the other was definitely 45mm and was not something I have encountered before. I looked for specific 45mm cup tools last night and I couldn't find any. Product defect or operator error?

It could be why it was so painful to remove—it may have been "installed" with a lot of red Loctite instead of proper torque. Looking back at the photo of the two cups, the threads are pretty different looking between the two. It's possible someone may have glued that thing in there because of a lack of proper tools.