NebuK wrote:But i also have a question - do you think the shot ran too blond (as far as one can see - lighting sucks i know, sorry)? I always have the feeling the shots are quite blond, but i'm not really sure.
The striping looked even and I saw no evidence of channeling. Take a look at the video When did this espresso extraction go blond? and the comments. It isn't easy to see, but the "pucker" appears around the 18-20 second mark; blonding usually sets in around 5 second later. It could have been cut off a few seconds earlier to reduce the sour taste you noticed.
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