I would strongly advise not to follow this step and following ones: removing the 2 Wi-Fi antennas is not required for complete disassembly of the motherboard and battery, and you may potentially destroy your antennas: I scrupulously and foolishly followed this tutorial step by step and now I have severe Wi-Fi problems on my iPad because one of the 2 antennas has been damaged during the process (and by reading all the comments on this page you'll see that I'm not the only one to have this issue...).

=> As someone else already mentioned it in the comments, just skip most of these steps and go directly to something like step 79.

You may partially skip steps 46 to 100, as it is not really mandatory to remove all those parts in order to remove the logic board and the battery.

Isopropyl alcohol (and certainly not ethanol!!!)

I broke the screen glass of my ipad just right when I moved the guitar pick towards the upperleft corner of the screen as depicted in your instructions. (Whereas my ipad screen was in perfect condition : no scratches, not broken at all...). There must be something wrong here. Be advised: move the pick towards the corner with caution !!!

If you dare to use alcohol on your device, at least use isopropyl alcohol, not ethanol!!!