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NotThamesWater-
Ah yeah I meant to add that, I tried the single-hole tip on that site but it was a pain as it either wasn't on tight enough so would leak, or so tight that it was a pain to get off for cleaning.
I bought some M6 acorn nuts and drilled out a 1mm (or 1.5mm) hole in one, and that's worked great. As it's a nut it's also easy to get a good tight fit and also remove for cleaning. Only issue is that with the step between the nut and the want itself it's easy for dried milk to accumulate so you do need to clean it regularly.
mmccarthy
It's a 51mm tamper, I just got a generic £10 one but I do advise tamping on the lighter side. Not sure if you caught James Hoffman's recent Europiccola video but tamping at the pressure I was used to would result in relatively little water passing through the centre of the puck compared to the edges.
On that note, I'm not sure if your one comes with a bottomless portafilter, but I definitely recommend getting one. This site has a pretty comprehensive selection of parts: https://www.theespressoshop.co.uk/en/Spare-Parts/c-49.aspx?BrandIDs=42