I would like to suggest 2 other things. There are a lot of explaination on how to get everything square, but nothing about the leadscrew. There is nothing that mention how to align well the leadscrew, in order to avoid any wear of the POM nut.
One amazing bonus, would be to show how to disassemble the tool head, and dismount the rail for maintenance or replacement, in case of issue.
In my case, when I was done assembling the printer, I had an issue with my z rail not being properly parrallel, and it created friction. I was terrified of disassembling the printer, seeing how early it got assembled, and how long it took until that point to finish the printer.