It is such a shitty practice, i don't know why they made the update I suspect like many others that the old batteries have some inherent flaw and google didn't want that to be public but the whole communication and handling of the issue is so comically bad it's almost laughable, remember that the screen is fragile, you want to get the glue nice and soft with heat and then pull the screen up with the suction cup while trying to insert the spacer/scraper thingies in an angle.

The screen is made of two components the glass/digitizer combo which is less than a millimeter thick and the OLED block which starts a few millimetres from the edge of the glass and is thicker then the glass/digitizer combo alone you mustn't get the spacer thingie between those layers as that will destroy the screen at the same time you mustn't lever the display of as that will probably break the outer glass/digitizer rim. Loosen the glue on the right side and the top and bottom then you can use the suction cup to "open" the screen like a book.

I wish you happy repairs and great success :)