The Dream: Pietro Flavor, Motorized and Affordable
The Pietro Hand Grinder with Pro flat burrs is revered for delivering some of the best filter coffee clarity and sweetness. However, its high price tag (~$500), heavy weight, and notoriously poor ergonomics (instability while cranking) hold it back.
The Solution: A Community-Built Hybrid
Coffee enthusiasts Merdad, Aaron, and most notably engineering student Durless (Durlis) invented an ingenious modification for the cheap, motorized A2 grinder (around $100, ~700g).
How the Modification Works:
- A beautifully machined all-metal adapter replaces the A2's base unit.
- It accepts the famous 58mm Pietro Pro Brewing burrs (affordable LeBrew versions are also available).
- The low RPM of the A2 (~60 RPM) perfectly extracts the burrs' signature profile.
- The adapter itself was offered for an incredible ~$40 USD in the first batch.
The Coffee & The Workflow
- Taste: Stellar. Expect the high clarity, silky body, and intense sweetness of the original Pietro.
- Grind Speed: Slow, roughly 1 minute for 15 grams. Perfect for multi-tasking (heating water, preparing filters).
- Workflow: Some tapping and shaking is required to clear the grind chamber, a minor trade-off for the flavor.
- Criticism: The magnets holding the catch cup are somewhat weak. The grinder can stall on very fine, light-roasted beans (easily fixed by tilting or a quick restart).
Conclusion & Future
This mod is a prime example of the incredible creativity and problem-solving skills of the home coffee enthusiast community. It democratizes access to a world-class flat-burr profile for a fraction of the cost.
Durless is even exploring adapting the mod for 64mm burrs, which could be game-changing!
Check the description below for links to his Discord and Instagram to follow the project.