You're right, there is no difference in the 'performance' aka A2 mode when you tinker with the refresh settings.
Also, another thing I didn't mention. The progress-bar like widget I used at the beginning of the video is for setting the
contrast. It helps in the fast mode as it emboldens the fonts basically spilling the ink over the edges lost due to decreasing colour depth.
~170 setting works quite well for A2. 140 is enough (for me) for the 'quality' mode, even though it appears a bit washed out on the photo. I took the pictures at night with a fluorescent lamp hanging above my head.
Click on the thumbnail below and then on the magnifying glass icon, and on the magnifying glass icon again for a full size picture,
