Thanks and interesting. Looking forward for your next episode.
I haven’t experienced that ticking BEO to on makes a considerable difference. I think I will continue to forget the relevance since also your experiment shows the delta is very small..
I’m not familiar with canon, but could be a weaving issue (google : Epson weaving technology print)
At higher higher quality settings the weaving (multiple passes) is more dense and different interference of the drops between the various passes.
A calibration of the paper advance system might...