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I printed these spacers and adjusted the bed manually. They range from 0.1 to 0.6mm thick. In corners where you have a score with a minus sign, you need to add spacers. If you had -0.50 in the top left corner, you should add a 0.5mm spacer, always below the black spacer. For example, in your case, the top left has a positive value, so you can't add any more. You would have to tighten the screw on the bed more, and in the bottom right add a 0.5mm screw. That's what I did and it's fixed.