[jampa]

From the creator, in a reply:

"CNC is the safest and most efficient way. Using a hot air gun to remove it normally will cause irreversible damage to other components on the motherboard."

[lofaszvanitt]

Yet, he uses hot air gun to solder the new chip. There are ways to safely remove that old nand chip, but why would they show the state of the art methods?

[rcarmo]

The epoxy below the original chip would require a lot more heating to remove than soldering in a plain chip.