dfk41 Do you not think the balance of the shot is affected since a spouted pf is far hotter than a bottomless?
It’s affectinflg temp but not in the way you’re saying, even a preheated spouted PF resulted in a cooler shot of espresso than an non-preheated bottomless PF in my testing. Ran approx. 8-10c cooler.
But some people do like cooling their shots and claim it does great things mind you.