Thanks, Erik82, but I was referring to possible fine-tunings for the V60 (I probably expressed myself not clearly). After a few years of practice, I know how to dial espresso and move into that realm, but the V60 (having a huge manual part involved in the brewing process) is still very new to me. I guess getting a

You might also find useful: "Decent Espresso news"

I have no experience with E61 machines, but as far as I know, it has some kind of preinfusion system, consisting of several valves and springs built in, that delay rise of the pressure during first few seconds, even if it is set to more than 9bar. Is it possible something to be wrong with it ? {image}

Well generally speaking in espresso sour is underextraction (grind finer) and bitter is overextraction (grind coarser). But with light espresso roasts there's a lot more going on than that so it's not that simple. With lighter espresso roasts you want to do a pretty decent PI (say 7-15s) followed by a pretty normal shot time of around 25-35s as

Indeed. Thanks for pointing that out. Now it is a matter of fine-tuning with the same beans to make more experience. Does it go like with espresso that if the cup tastes slightly bitter (yet not papery), the grind settings must be finer? Are there any other variables to take into account? As always I would stick to the

Great to hear that it was the beans as that was my first thought (and reply). Now you see that beans do make such a large difference

I've been using the Ultra for espresso for over 4 years having ground 90kg through them and they work perfect for espresso. Yes you're near touching which is completely normal for such a unimodal burr

Stoll espresso is great

You do know that shimming and using the marker test is no guarantee that it's aligned. Or did you test all of the runouts? There are multiple people here that bought a DF64 series grinder that had a good marker test after shimming but where horribly misaligned. Your story sounds like a alignment issue. Yes new burrs need seasoning

Perfect! And that way you don't have to worry about any brown stains either because you won't know if it's from the coffee or if you had a little accident. Ignorance is bliss. I love how this thread just went from deep paranoia about contracting disease to drinking from shit-stained undies...