Cameras not in the same focus plane?

[Hugues]

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I looked at the focussing distance, and it's 43cm, so it's the same as what I found out with the white paper and the masks. 8)
At this point there is a slight zigzag, or pixelation to the horizontal line evident, and I'd have to say there is something slightly wrong with your set up.
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Found out today that my projector focus was at 50 cm because the front lens was probably not set right.

There are 2 tiny holes on the ring of the projector lens, i carefully rotated the lens counter-clock wise for a few degrees only and i could bring the focus back to 42-43 cm, which is the focus of the cameras it seems. So now my cross is focus at 42-43 cm.

I did a re-calibration with this and re-scanned, i think i have sharper details, but not 100% sure.

The sad thing though is that my left corners are still curled.

But anyway.