Yeah, .
For me temp or more temp stability is key,
Unless you have a scace device you will never know for certain what the temp is
But like grind size as long as you can assign a number to that setting, and it’s repeatable, it’s just a number.
Once you sort your temp it could be something a simple as that, while I still think it’s the beans
Go back to basics, get temp sorted use the stock basket, it will allow a coarser grind, put the vst in the drawer for a while. Get a repeatably prep system and go from there, even if it means buying 2kg of the same bean to get used to what your changes do.
I’ve never been a massive fan of square mile.