Looks like you could do this with just steps 9 - 13. Remember to cover the blank soldering spots with shrinking tube. Than cover up the whole cable over the spot with some shrinking tube too.
Because i had problems and the touchscreen still sticks on the glas, i highly recommend the following video!
It shows how you separate the whole glas - not just the top, edge and side. You have to unglue the the touchscreen too!
Here you can see how the touchscreen unglues from the glas by heating the glas (1:40) (german):
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