Stock machines use an 8mm hex head bolt that protrudes beneath the shower screen and presses into the tamped coffee puck. This design has two flaws: 1) damage to the puck promotes channeling and contributes to a sour taste from under-extraction and 2) spent grounds collect around the bolt head and go stale if not cleaned away.
After installation, the flathead screw will sit flush with your shower screen and can’t damage the coffee puck. There is also nowhere for spent grounds to collect around. The end result is an espresso machine which is easier to clean, more forgiving of technique, and will consistently yield better tasting shots!
Take the work and uncertainty out of this popular modification with our ready to install kit! Included is a new Rancilio seal, pre-formed Rancilio shower screen, pre-countersunk jet breaker, high quality stainless steel flat head screw, and wrench.
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