I've done the espresso mod and its does a decent job though I have moved to a hand grinder now. I can refit the part if you wish - it's the bit in the tray in the last photo.
Melitta Calibra Coffee Grinder Digital Scale Burr Grinder Stainless Steel Black
Melitta Calibra Coffee Grinder – Upgraded Steel-Lined Catch Cup
Melitta Calibra Coffee Grinder with Integrated Scale - Black
Melitta Calibra Coffee Grinder
Melitta Calibra 1027-01 Coffee Grinder with integrated scale.
Melitta Calibra 1027-01 Coffee Grinder with Integrated Scale
