Some filament types print best on a polyetherimide or PEI (aka Ultem) coated bed. @JesperJuul discovered that clever3d.com would make custom aluminum beds with PEI chemically deposited onto the aluminum. https://clever3d.de/epages/7a4290fc...6cc-9b99-eadef22228e2/Products/c3d-DDP-PEI-sw @Alex9779 improved upon their offering by supplying clever3D with drawings for a special BigBox bed with a recessed edge so the bed clips rest below the print surface so that we never have to worry about the nozzles hitting the clips. Now that a few of us have these beds, which are thermally quite different from the stock borosilicate ones, we should share the bed settings that are working for us. I'll start with my current project using colorFabb HT (aka Amphora HT5300) colorFabb HT First layer bed temperature 125C First layer hot-end temperature 280C First layer speed 25% Layer 5 bed temperature 120C Layer 5 hot-end temperature 265C Please contribute your own best settings for the clever3D bed.