Nice Video!

You said the portafilter is an E 61? (seems to hear) Can you expand on the subject of 'portafilters sizes standards'? [[Namely I have a decent espresso machine, but i don't like its original portafilter and I would like to change it with another one in the same size]] If there are standards of sizes, that would help I think... Thanks,

do you know if i can change the steam tip of my qm 3004 with this one? i heard a tip with only one whole is harder to use!