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Just FYI, I managed to do this without a special toolkit. An exacto knife will unscrew the main two screws at the lightening port. I had a small screw driver from the internal screws. I also successfully used a regular screw driver covered in electrical tape to wedge open the sides. Furthermore, I used a suction cup from my son's hot wheel bath tub toy. So where there's a will, there's a way. No kit needed.
You inspired me to use an exacto knife, my kids' suction cup bath toy and a jeweler's screwdriver for the screws on the inside. Took no time at all.
I sandwiched 4 pieces of electrical tape between the connectors and the metal shield and screwed it all back together.
It's already working better, hope it lasts. FINGERS CROSSED!!!