Shades of Coffee - Gaggia Classic kits from MrShades
Gaggia Classic Pro PID kit in action | PID controller mod - YouTube
Gaggia Classic PRO PID - TIMER Kit Plug and Brew | eBay
gaggia pid" 3D Models to Print - yeggi
Gaggia Classic Mod: no water tank, instead fixed supplies for fresh and waste water, PID and manometer
Gaggia Classic Pro customised with PID, Gauge, Dimmer & 9 Bar Pressure Spring (All colours available)
PID Retrofit KIT for Gaggia Classic - European Model RI9403 [KIT-GGX-EU] - $149.50 : Auber Instruments, Inc., Temperature control solutions for home and industry