Importance of coffee grinders.
How important is the quality of the grinder to puck prep?
I have a fairly cheap and basic grinder (Sunbeam) which I am thinking of upgrading at some point.
However how much difference will a decent grinder make to the overall results from the coffee?
Currently use a bottomless portafilter, wdt, self levelling tamper, but rarely get a coffee without any channelling. I also use decent fresh roasted beans.
I can make coffee which tastes good, but suspect it is not as good as it could be.