This is overly complicated, only steps 1,4,5 and 10-12 are relevant to replacing the digitizer glass.

Also, no mention of removing old adhesive with isopropyl alcohol to ensure a smooth fit for the new digitizer

This is part no. 00095-AF.

I love the ifixit guides and this one is up to their consistently high standards, have to concur with the previous comment though, if your customer brings you a completely trashed digitizer a good number of the steps become obsolete and its down to brute force to remove the adhesive even if you've taped the screen, picks become redundant. One piece of advice that could be incorporated is if the digitizer is beyond repair, just cut the ribbon and be done with it, opening a trashed screen 'like a book' is not necessary, otherwise spot on guys and thanks for making my day easier!