Does Flow Control Improve Espresso?

I install a flow-control kit on an E61 group, and test it thoroughly. Is this the answer to our prayers? Or a lot of marketing bollocks? Only one way to find out...

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Audio capture: Zoom H-5
Audio edited with WaveLab Elements 10.0.70
Video Capture: Panasonic HC-X920
Video edited with DaVinci Resolve 18.0.3
Still images edited with Gimp 2.10.240

Production Assistant: Leo Greene

Music:
Kalimba Relaxation Music by Kevin MacLeod
Link: https://incompetech.filmmusic.io/song/5711-kalimba-relaxation-music
License: https://filmmusic.io/standard-license
Acid Trumpet by Kevin MacLeod
Link: https://incompetech.filmmusic.io/song/3340-acid-trumpet
License: https://filmmusic.io/standard-license

Видео Does Flow Control Improve Espresso? канала The Wired Gourmet