putting it back to pureboot will be easy…
one point worth noting, if you have librem key initialized and you have your public key on thiumbdrive…
then when you flash pureboot on first boot it will try do factory reset (that erases librem key and generates new keys) , as i am using keys to more than just signing bios/drive encryption… on first screen i select cancel.
as we don’t wish to reset libremkey.
then add public key to bios, then reset TPM … and that’s all
if you are not using gnupg key on librem key to anything other , then just follow factory reset… as it’s simplest route.