> using PEI coatings that'll scrape off easily with metal-on-metal contact. Yeah, you're correct, it's a glass bed so I use it to do the 4 corners (every few m

> using PEI coatings that'll scrape off easily with metal-on-metal contact. Yeah, you're correct, it's a glass bed so I use it to do the 4 corners (every few months) and then use a BL touch to do a 3x3 grid on top of it.