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rusty pie

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About rusty pie

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  1. I’m not sure what we are trying to do with the piston so not sure it will work, but to hold smooth cylindrical parts I have a rubber tool which works pretty well, it’s called the boa constrictor.
  2. I’m not taking sides and my knowledge of coffee extraction is well below that of both the parties here, but I’m interested in understanding the physics of the process. Any chemical and thermodynamics exchange happens through a boundary surface and is somewhat proportional to the area of the surface (that’s why radiators have fins). Reducing the average particle size by half reduces the area of the particles to one fourth and the volume to one eighth, so the total area for the same volume (and consequently same mass) is double. Surely this larger exchange area must increase the extract
  3. I hope I’m not going to bore people to death by going too technical, but I am thinking of a way or reducing the flex without adding much in terms of structure. Currently the strengthening bracket reacts in torsion to the overturning moment introduced by cocking the lever. Open section beams (such a c-section bracket) are much stiffer in bending compared to torsion. If the bracket is turned 90 degrees to have vertical flanges running for the full height of the front panel picking up directly on the top and bottom plate, the bracket would react in bending instead of torsion. The flange
  4. That’s how I’ve ordered mine but it hasn’t yet made its way down under.
  5. I don’t mean to say that flex is a problem as I’m one of the first batcher who can’t wait to receive his outstanding piece of machinery, but if this bothers some potential customers, a relatively easy and inexpensive way of reducing it would be to have the strengthening plate turned around 90 degrees with the two flanges running vertically as close as possible to the group and running for the full length of the front panel. I appreciate that this might be not compatible with the layout of the internals, but I thought that it could be worth suggesting it anyway to @Paolo_Cortese.
  6. Apologies if it’s a dumb question...... why pulling through that amount of water?
  7. Are there others in the first batch that have not yet been able to contact Paolo for the balance payment?
  8. Well I’m a little concerned as I’m in the first batch but not having any luck in getting a response from ACS to my queries about settlement payment and shipping.
  9. I went with this selection too, I like that both arms do not encroach the space above the tray at all, which was a gripe of mine with other machines.
  10. Is the second email from Paolo (around an hour ago) supposed to contain an attachment? Mine didn’t have any.
  11. Ok thanks, I did a paper strip hardness test which came with a new clothes dryer a few months ago and I think it came out <150 ppm
  12. Brisbane, I’ve heard in general it’s a hard water area but I’m in a brand new suburb and seems to me it’s rather soft instead.
  13. Would it be right to think that I don’t have to worry much about scale in my new Vostok if, after 2 and half years of use at my new home, my kettle does not show the slightest sign of scaling? We use water filtered by a simple fridge filter.
  14. Talking about grinders, will a baratza sette 270wi grind sufficiently well to get the best out of the V?
  15. That will be a worthy addition to the machine which I’m sure customers will appreciate very much.
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