@noynekker The reason I used the channel CE on the bus was so I could bump up the trim, and therefore add some of the transformer saturation the CE emulates.
As to Mister Happy's test, yes, the CE as shown in the tip will add level (I saw less than 2.5 dB, but whatever - maybe the controls were turned up a bit higher). However, if you think the only differences are from the level increase then you're missing what the CE is adding.
Although I greatly appreciate anyone making the effort to try and come up with a test to determine whether the tip has merit or not (and I wish more people would try things out for themselves!), unfortunately the test is flawed in three fundamental ways so it's impossible to draw any meaningful conclusions - see the screen shot showing spectral energy and correlation.
1. The material is pretty much mono, so the CE can't affect the stereo imaging because there isn't really any stereo imaging to affect.
2. Compared to most mixes, the highs are way down compared to the lower frequencies. Like imaging, the CE influences the high frequencies but there aren't enough highs for the CE to "chew on."
3. Most importantly, the source material isn't the same for the two of them. Do a null test, and you'll hear that one appears to have reverb or other ambience, while the other doesn't.
As a result, the test is meaningless. For a more meaningful test, I took a short clip of music, copied it, processed one with the settings shown in the tip and rendered it, then normalized both clips to -0.1 dB. I then combined them to a single clip that you can listen to at the following URL.
https://1drv.ms/u/s!Am5TdLYuWxQOkhw2n1E5Mj5BWRSm I think the difference is subtle, but nonetheless pretty obvious. If you don't think so, listen carefully to the difference in the snare's attack transient, the cymbal at the end, the imaging for the guitar sound, and the high-hat that appears around the middle of each clip. I'm not only quite sure you'll hear a difference, but will prefer one of the clips over the other. That's the one with the CE.