
Golden rule:
1:15 to 1:17 coffee to water (1 gram of coffee to 15|16|17 grams of water)
Pro Tips:
If it tastes sour → grind finer
If bitter → grind coarser

Pro Tips:
If muddy → grind too fine
If weak → add 2g more coffee

Pro Tips:
If flat → use fresher beans

Pro Tips:
If shot runs fast → grind finer
If slow → grind coarser