Originally Posted by
cny-bikeman
It's fine you took the pic with the bike upside down - it would be considerate if you flipped the photo before posting.
You managed to unspring the derailleur, which can be done without the spring breaking or being removed, but could be from the end of the spring that inserts into the derailleur body breaking. Yes, compare to a working 105 and you should be able to see your error, or get someone at the shop to show you where you went wrong.
Yes, somebody already mentioned that I should have done that. I didn't directly reply to that, I don't recall at least, so I will now. If I need to post any pictures in the future I will either flip the bike around in the stand and kneel, or I will be sure to rotate the pictures. Also, I apologize for not having though to do so originally.
I know where I went wrong, asking my room mate to put tension on the derailleur to remove tension from the chain.