Yes the grid generation is also separate. You could create an arbitrary grid to hide seed backups from evil maid 

 ithink its easier to just make a wallet with electrum and memorize the 12-word mnemonic

Prinzessin_Eclipse

the grid is used to memorize the words... they are standard 12 word or 24 word seed phrases, the grid thing is a way to remember easier- you can theoretically make a bunch of copies of the grid physical/digital and not compromise the seed.

lots of ideas possible with this concept even for tattoos if you are into that

bitcoin

BORDER WALLETS: Escape Totalitarian Regimes With Bitcoin In Your Brain

BTCsessions

https://www.borderwallets.com/docs/the-solution

the grid is used to memorize the words... they are standard 12 word or 24 word seed phrases, the grid thing is a way to remember easier- you can theoretically make a bunch of copies of the grid physical/digital and not compromise the seed. 

lots of ideas possible with this concept even for tattoos if you are into that