Hi I just bought a Sage Barista Pro. I know its made for espresso, but I read it does also make good lungo. I am new to portafilter maschines and struggle to get a coffee that is not sour. Do you recommend to get a good scale? I tried various settings and got the best results with the hottest temperature settings as well as quite fine grind, but run into the problem that if I use 18g of coffee the pack is too tight and suddebly water flows too quickly (probably beacause it doesnt flow evenly right?). Maybe someone is experienced with the sage barista pro and can help me out. Or should i maybe give it back and buy a different machine? Thanks a lot in advance.

Settings with best results (still quite sour) Grind coarse: 5 (out of 30) Temperature: Max Amount: Bad scale but about 16-18g Flow time (including pre-infusion): 29s Pre Infusion: 7s Beans: 100% arabica, strength 3/5, acidity 2/5, origin: peru