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Nerd Out - Coffee Brewing Guides & Barista Tips

E61 Grouphead Upgrades: The Best Accessories Worth Getting
58mmJun 5, 2026
E61 Grouphead Upgrades: The Best Accessories Worth Getting

The E61 grouphead is found on some of the best prosumer espresso machines in the world - ECM, Rocket, Profitec, Lelit, La Marzocco and more. It's a proven, reliable design that's been around for de...

Gaggia Classic Upgrades: The Best Accessories Worth Getting
58mmJun 5, 2026
Gaggia Classic Upgrades: The Best Accessories Worth Getting

The Gaggia Classic is one of the most popular entry-level espresso machines ever made - reliable, repairable, and with a huge community behind it. It's also one of the most upgrade-friendly machine...

Breville Dual Boiler & Oracle Upgrades: Best Accessories | Coffee Nerd
58mmMay 22, 2026
Breville Dual Boiler & Oracle Upgrades: Best Accessories | Coffee Nerd

The Breville Dual Boiler and Oracle are two of the best prosumer espresso machines on the market. But even the best machines benefit from a few smart upgrades. Here's what's worth adding. 1. Stainl...

Breville Oracle & Dual Boiler Diffuser Plate: Why It Cracks (And What to Do About It)
58mmMay 21, 2026
Breville Oracle & Dual Boiler Diffuser Plate: Why It Cracks (And What to Do About It)

If you own a Breville Oracle or Dual Boiler and your shots have started tasting inconsistent — bitter, sour, or just harder to dial in than they used to be — there's a good chance your diffuser pla...

Portafilter Sizes Explained: What Size Is Your Espresso Machine?
51mmMar 12, 2026
Portafilter Sizes Explained: What Size Is Your Espresso Machine?

One of the most common questions from home baristas is a simple one: what size portafilter does my machine take? It matters because everything that connects to your grouphead — replacement portafil...