@Ken - yes and no. I subscribe to your analysis in general and that is why I set up the model the way I did. The question however is, do you start with the most delicious roasted beans (100% quality level) in the world (probably very expensive) and next do not do a great job as a barista with

I see Jim's point that he underlined in a PM. Even though the data shown so far do not support the statement that variance inside sample classes per machine is as big as the entire sample population's. (I myself) Having called "espresso" a multi-variable optimization space in which we are on the que...

Jim et al., I am extremely curious to see where this all ends and hats off to your approach to validity versus statistics. One point in the debates so far i do not understand and maybe someone can explain to me. I see the test/retest "noise." I also read a debate about differences between grinders a...

Speculation yes, but also an experiment to see if there could be any reason to look into basket differences as potential influencer of taste whilst no-one did a controlled double (triple?) blind experiment yet.Looking at the photos in previous pages of this thread it occurs to me the holes are in th...

A few more or less related thoughts. Bruno, I am pointing to the relative importance of the grinder and supportive evidence to that position. If I were you, I would not step up to a suboptimal offer that might be marginally better. If you want to spend money, find a used/refurbished PID and put it o...

This below is implied above but may not be entirely clear. Your answers to the questions for your functional and non-functional requirements lead up to a few new ones. - you do not want to plumb in, but would you want a convertible machine, and if yes, should the conversion be easy (like turning a l...

The other day I received a telephone call from an export manager of the FAEMA/La Cimbali Group, straight from the Milano region in Italy. I actually asked him about this. He replied "no we did not sell anything, it is just patents in Italy are protected by law only for 25 years." Or, starting from 1...

Espresso coffee is a multivariable optimization space that may have only one "godshot" co-ordinate, but several very well but slightly different suboptimal co-ordinates. It is difficult to get consistent if you change too many parameters at the same time. Keep changes related to one variable, if pos...

Yes, indeed.No, indeed.Take a clean double basket and pour water through it to see how fast it passes. You would expect some back pressure, but actually the double basket has such a large opening that the flow rate from the pump - without coffee - can be sustained without the basket running over (at...

I happened to visit the place - several La SanRemo Verona TCS machines with SanRemo and Mahlkoenig grinders. The portafilters were still there: original ones that came with the machines and Kees van der Westen. I found three different baskets, but which belonged to which and how they got there was n...