RE: Discovering that PrusaSlicer settings for Prusa's own filaments are not always accurate
Another option is to buy a 12"x12" G10 sheet from somewhere like McMaster Carr, then score and break it down to size, sand the surface, and clip it on. I did this for my Mk4, and have recently filed out some notches to clear the nozzle wiper on the Core One. I prefer it for TPU. Not having it glued to steel means that you have to be careful to install it with any warp oriented downward so that you don't get floating in the middle that will cause the bed mesh to fail. These expensive pre-made options would be a bit of a luxury. If I used my G10 more I might invest in one.
-J
RE: Discovering that PrusaSlicer settings for Prusa's own filaments are not always accurate
TPU sticks too well to G10 (have to use a separation layer) and it's the only surface I can get POM to stick to (still have to prep the surface by sanding). Overall it's not a bad print surface. It's just stupidly expensive for what it is.