Sorry for the delay. I got my build plate onto a machinist inspection table and it looks like the flatness is within 0.18mm. I marked my plate's edge in one corner and I'm going to start experimenting with orientations. I'll let you know what I can find.
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tomnagel 123
Please check if your glass plate is flat, e.g. with a ruler. There have been reports of unflat glass, and your reseller will help you if yours is unflat.
(0.2 - 0.3 mm flatness over the whole plate is good enough, most will be compensated by active leveling, and the remaining tolerances are absorbed by the first layer).
Are you using the default 0.27mm first layer thickness?
Since the active leveling uses 3 measurement points, the shape of the glass does matter. Rotating the plate 180 degrees (keep same side up!) could help as well.
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