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Did you run pressurised baskets before, if it's spraying everywhere it may mean that there isn't enough back pressure from the coffee grinds to slow it down. Either heavier on the Tamping or a finer grind should help.
This is a good resource, should help.
https://www.fivesenses.com.au/blog/espresso-shot-troubleshooting/
What I am not in the market for is a grinder upgrade. That may be the sticking point.