JW advanced spring lever
Want to make coffee like John Weiss?
Shared by John, this is a 9bar lever style profile with a very short hold. 6ml/s infusion rate and 25s decline to 3 bar. With further steps to help as a safety net if you miss.
I will update with more details and graph once I’ve tried it, from what I see, the aim is to grind so the flow remains under 1.5ml/s and ends with a pressure close to 3bar