@cmdrSprocket @TechConnectify I can speak about some European ones. I can definitely say that they don’t label them with the same letters as in the video. ;)

Other than that, the ones I adjusted in my office are extremely similar. But there is one detail that I’m assuming was cut from the video for time: the 15-degree latching-speed position is adjustable in many cases. In my case the swing arm was shortened/lengthened by turning it.

I look forward to the deep-dive video about door closers!