I made a mistake while recording the video: when disassembling the brewing group, the direction of installation of the brewing piston is (at 21:26 minutes, before screwing on the ring nut). There is the riser pipe with Krämer valve at the front - towards the front of the machine!
When installing the brewing group (from minute 22:51) the riser pipe is at the back - towards the coffee funnel
This must show ahead as before the expansion.
In terms of taste nothing changes, but for the sake of correctness it should be mentioned.
17 ноя 2020