it is way easier to remove the display sensor using hot air. Add a little flux and apply hot air @ 400c for a few seconds and it flips right off clean, no solder bleed onto the other pads. clean pads if needed then use kapton tape to secure it onto place over tinned pads of the new display, add flux and swipe over the pads with a iron. Clean with IPA and done. The right tools make the difference here, the photo of the repaired pads in this guide look horrific.