Completed the replacement last night. I used the tri wing from iFixit and an iFixit replacement battery. The only hiccup I encountered was in removing the old, original battery. The final screw on the bottom was over-tightened and it stripped. Everything else went well. After installing the new battery, and before turning the laptop on, I reset the SMC just in case. Everything is working perfectly and my laptop now has it's original approximately 9 of battery life.
