You did an amazing job, soldering wire to BGA pads must have been fun :)

What was the probe tool you were trying to use?

Looks like a “spider probe,” example of one here:

https://blog.acelab.eu.com/pc-3000-flash-spider-board-adapte...

Thank you :)

Part 1:

https://news.ycombinator.com/item?id=40826817

https://markuta.com/eero-6-hacking-part-1/