I don't have a scale, and I use whatever basket came with the machine, which I do believe is unpressurized. I don't have the bottomless portafilter, though. I

I don't have a scale, and I use whatever basket came with the machine, which I do believe is unpressurized. I don't have the bottomless portafilter, though. I feel like eyeballing pressure gauge and the flow from the regular basket is usually sufficient for me to ascertain the quality of my grind, tamping, and distribution.