GAGGIA CLASSIC PID + SETTE 270WI - NO BETTER ESPRESSO COMBO FOR UNDER $1K. My friend u/dskot and I put in extensive real world use & tests, and wanted to help keep
DIY PID for my Gaggia Classic : r/gaggiaclassic
PID on Gaggia Classic Pro - Game changer to budget espresso brewing at home - YouTube
Modifying my Gaggia Classic Espresso machine - Cal Bryant
CoffeePID - a generic PID controller for coffee machines — 1024kilobyte
Modifying my Gaggia Classic Espresso machine - Cal Bryant