Grind retention is : / I use a Rancilio MD 80 that I picked up for 80CHF. The guy I bought it from didn't know what he had. It's as large as my Gaggia, but gri

Grind retention is : / I use a Rancilio MD 80 that I picked up for 80CHF. The guy I bought it from didn't know what he had. It's as large as my Gaggia, but grind retention be damned, I'm not giving it up.