Bump for price reduction!

A comment on my experience, preference, and opinions... I also prefer light roast espresso over most anything else. Here's what's on bar right now: {image} My experience with flow profiling has been exceptionally positive, and I'll no doubt return to it sometime, but part of my way of processing things is to try then for extended periods of

Ahhh the filter, ok, so I won't run it with the current filter then. Replace it. Check

Different chemicals extract differently depending on temperature and pressure. For example, one of the main bitter elements in coffee, caffeine, best extracts at around 9 bar - so if you want relatively less caffeine extracted (and thus less bitterness), then one option would be to extract at a lower pressure

Bingo this is the major concern. Just watch as the rust grabbed by the filter gets released into your boiler

You can tape the (upper) funnel to the top of the grinder to get the funnel out of the way and look at the gap between the inner and outer burrs while rotating. That's what is important, not the shaft outer diameter. I can't really recommend a DIY procedure because if you get it wrong, then you have to

When I buy quantities, it rests on the counter until it's primo, then it's all frozen. If it's a coffee I know, I freeze a day or so early which gives a bit more leeway. If you haven't used this, "Frozen Coffee Storage Calculator", glad to be of service

What follows is biased opinion, not proven fact. On my E61 HX, I spent a long time trying out different OPV settings. I eventually selected around 8 bar on the gauge as seeming to provide me the most enjoyable shots across both the comfort blends and San Francisco area filter roasts I was pulling. This was probably around 10

FWIW here's a vid of my extraction on an aligned (marker top and bottom burrs) 807 with maybe 20#'s through it. I roast medium/light- and this is a Colombia/Kenya blend. I don't note any significant pressure climb and the stream comes together pretty well, although a bit wiggly near the end. 17g in/20 seconds.{video}

For the cheapskates like me this{image} Rhino at $24 is pretty good - no timer but 1/10th gram - and fits under a Cafelat Robot