After going through all of the steps, replacing the battery, and re-assembling, something is wrong with the display and the laptop is no longer usable as a laptop. It only works with an external display. This step appears to have been the culprit. Although I understood the directions and was very careful, either the cable or the socket may have been damaged. As I look back, I question why ANY of this needs to be done, with the exception of opening the case and disconnecting the battery cable to replace the battery. You’d be better off following the idiots who used dental floss and made YouTube videos. I still recommend the iFixit tools and solvent. In any case, thanks iFixit for directing me to take the extra steps that destroyed my MacBook Pro.