I put the foil in larger squares to fit under the silver metal tubes used as offsets for the heated bed. I’m not sure if foil under the pei will work, my worry would be making the bed uneven vs just adjusting the position. I just remember getting under the silver tube things was a massive pain in the ass so I do hope the pei sheet idea works tho lol
“Culture war” and “woke” is just code for “won’t let me be an unmitigated shithead and that hurts my fee fees”