Interesting. I get really great results with convex, been using it about 18 months and it seems to work well.

La Marzocco Linea Mini - Mazzer Philos

Cuprajake Been loads of testing done for doughnut shots and it’s been debunked for being bad.

I would like to see a test done of purposely misaligned puck prep. If there is a 5deg misalignment, which would produce less channeling convex or flat? I suspect the answer may be convex.

    Cuprajake

    Is that the right study? I can’t see anything about tampers, just baskets/screens and grouphead dispersion.

    La Marzocco Linea Mini - Mazzer Philos

      its not about tampers, its about doughnut extractions etc, which is what i was saying about the tamper changing the visual look of the shot, you can do it with a flat tamper by making a crater in the puck with wdt and having higher sides

      Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -

      Ah ok, 99% of that article is way over my head.

      I made a quick diagram about how I imagine convex tamping working. I’m not saying the end result is better, I know it’s not from using both, but I 100% find a convex tamper results in consistently better shots with my lazy workflow - counter tap/distribution tool/tamp - no WDT.

      Before the physics guys jump in, I’m absolutely not saying there’s science behind this, just reporting my findings.

      Obviously both will fill the basket to the edges, I’m just wondering if a convex tamper creates more of a ‘sealed’ surface for the initial moments water is hitting the puck.

      La Marzocco Linea Mini - Mazzer Philos

      12 days later

      I just use a self leveling tamper. I have an EazyTamp. You can get multiple base diameters and thicknesses and base styles for it. Along with numerous handle choices. It is abit of a pricey initial outlay, but then if you change your PTF or basket and need to change the base, you can just order another base. Or if you have two machines that take different size baskets, you can easily swap the bases. Even the spring and the flange size is changeable/swappable.

        JHCCoffee me too I have a wooden handle and also now a black one with the different bases too. I usually order when we’re over in Australia.

            Uncletits I usually order when we’re over in Australia.

            Do you have family in Oz? What’s your flight time?

            My daughter, grandson and son-in-law are next week moving from Whistler, British Columbia, Canada (a 5 hour flight from Toronto, Ontario, Canada) to Margaret River, Western Australia (near Perth, a 25 hour flight from Toronto). 😕

            She met an Aussi lad at the 2010 Winter Olympics and the rest is romantic history. Their lifestyle will change from mountain hiking and skiing to beach camping and surfing.

                JHCCoffee we lived there for 9 years and our daughter still does.

                24 hours on two flights normally, this time via Hong Kong. This is our third visit in the last 12 months to see our granddaughter and our daughter has MS

                  JHCCoffee and the rest is romantic history

                  The exact reason why I ended up in Great Britain. 🤣🤣🤣🤣🤣🤣🤣.

                    I have a Torr 58.5 Trap which I use with s 58 mm VST. Although you can nutate with it , I do not (not recommended now I believe).. Fill from grinder , straight tamp fingers judging the level on basket rim.
                    I do often WDT depending on the coffee.