dfk41 it’s a problem with the blending process. if you mixed them well, then the ratio would be quite even in 18gr dose. not exact, but close.
But my post was clearly for case of “same coffee with (reasonable) consistency”. My previous machine (Lelit Bianca) can vary up to 5 seconds in brew time (same coffee, same grinder/grinder setting, same scale). NOT to mention the temp fluctuation (and there was no way to know that).
I have watched a few charts for same profile. After 4 or 5 shots I realized they are very consistent, the temp, the flow, the time, the weight.
Of course Decent is just an espresso machine and it can’t fix other problems than what you put in the basket. but if what’s in the basket is the same, it will give you the same shot every time, and has the data to back it up.