Since I last posted on this thread, I have replaced the burrs on the Rossi and changed it over to the Rossi automatic grind collar which gives it an 80 step grind adjustment (up from 48).
Today, I adjusted the grind to get a 28 sec 2.5 ounce shot from my Elektra Microcasa Semiautomatica. I had a full Guiness effect with crema that lasted a pretty long time. Flavor was what highly fruited and balanced. This was a pretty fruity blend I have been drinking as drip. So that carried well into the shot.
A pretty satisfying experience.