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Sorry if this is stuff you’ve already looked at but I had punchy holes when I first got the Gaggia Classic, unscrewing and deep cleaning the shower screen minimised them. Stock pressure also exacerbated it and led to that quicker pick decay so reducing that could help too. Cocktail sticks are also reportedly a bit big for WDT, which might be a possible cause.
Ptown-
I tried cleaning everything recently but that doesnt seem to have had an effect. The shower screen was a bit warped and im worried its not sealing around the distribution puck. This could mean water is leaking out around the edges and escaping around the puck. Usually when watching the extraction it starts around the edge and fills in
Turkish
Anyone got any tips to improve here? Theres no obvious channeling or spray coming out the bottomless portafilter. Always starts very slow then speeds up a lot in the second half and has pinholes in the puck? This was 17.5g, distribution with a cocktail stick, 93 degree water. Espresso always tastes a bit harsh, like its over and under extracted