Ordering a replacement antenna to anticipate the one you will brake(I should say shred) is probably your smartest move to have a successful repair
Use a piece of cardboard paper behind the black tab, to give you some room.
Fold the adhesive removal black tab before sticking the adhesive,, to give it the shape, and be better prepare for step 10.
Be careful ! according to different other customers experience (read ifixit forum) and my own, it might be a hit or a miss.
I tried the upgrade to 16gb, no matter where or which one of the 8gb ram module is place, the Mac doesn’t want to recognize more than one module at a time, so I ended with 8+2=10gb , which is still an upgrade but deceiving money wise.
use two spudgers, one of each side of the connector.
Be ready to replace the glass (good thing mine was already broken, I ordered one). Wear surgery gloves and protective glasses. Trust your nose, if it smell melted plastic, it’s a good clue to stop the heat.
You may have to lift/remove a foam tape on the left side as well
I did not have to do this step at all, just tucked the cables one by one following the corner shape
I agree with Nicholas, the HD can stay at 45° angle sitting on the back of your hand, then there is enough space to remove the battery