[Grimburger]

True, properly zeroing out the headers on an encrypted drive will make recovery impossible.

How to do that reliably is another question.

[WirelessGigabit]

You cannot with normal tools as writing a 0 to the SSD does not guarantee it overwrites the 0 you want. At best it does, at worst it writes the 0 somewhere else and remaps the bit (or whatever its physical storage thing is).