My results: WITH blind portafilter: 8 Bar NO portafilter: 6.5 Bar see: {link} NOW, what is the REAL pressure?

Is there any videos online where they explain how to do this? thank you for your help

My R58 add maintenance a year ago, I asked the technician to compare the Rocket pressure gauge with a PF gauge, pressure was the same. In this case, if I want 8bar, should I adjust the pump with a blind portafilter until gauge read 8 bar? thank you

When I read, pump should be at 9 bar, is it with blind portafilter or NO portafilter? How do you read pressure, with OR withOUT blind filter?

With or Without blind filter when it come to adjust pump pressure? I to read the pressure gauge, when pump is running with no portafilter? Or I should use a portafilter with blind filter?

My grinder is 4 years hold. Only use for personal. (Average 5 cups/day) Beans use are medium-dark Does it need maintenance? Should I clean the burr? If yes, HOW? Is it something easy to do? Thank you

Need buying advice for my office. I guess buying for a office, because lots of peoples will use the equipment, I most have a different approche when selecting the equipment. We are 10 employees, it most be simple to use and reliable. My first choice will be the Rancilio Silvia. How about a grinder?

I find sourness easy to taste in espresso Get and scale + timer My scenario will use 18g of grind NOW: 1. Get 30g of liquid in the cup (try to be in the 25-35sec. range) 2. Taste. If sour, get 36g of liquid and taste again. Increase yield until sourness is gone 3. Example

What will be the difference on taste if you lower pump pressure versus lower temperature?

Today, I remove again all the beans and empty, the grinder work!!! Could it be the beans? They are new beans I had never tried in the past. Only comment about those, taste was like "grass" They are brown, not dark-brown. I add to raise temp to maximum and coarse finer to try to get something drinkable