So I picked up a Starbucks Sirena last week, and plan to do away with the PPF and tamp my own. I ordered a 28mm tamper and a Baratza Virtuoso, which I just took delivery of this morning. In my research for a grinder, I understand that the Virtuoso isn't exactly ideal for espresso, but can be passable if you re-calibrate the unit for a finer setting (which I found the instructions for on the mfg website).
I'm really hesitant to dismantle the unit to make this tweak as I'm not the most mechanically inclined, and I don't want to screw it up. My question is, has anyone had luck with this grinder without adjusting the calibration, or is it truly necessary to get a decent shot?
Thanks for any advice you can lend



