Terranova wrote:Will it make a difference to fit a lower funnel in steel, connected to a metal wire which is grounded to the sink or so ?
I think there would need to be an unbroken conductivity path between the burrs and anything that the grinds touch. So a theoretical wire would need to go from the burrs themselves, a conductive lining on inside of the funnel, then continue on and connect with the portafilter somehow. From my understanding, it wouldn't need to be connected to earth, it's just that everything involved in touching the coffee from the point it is ground onwards needs to be connected to each other. Glad to be corrected though!