I just bought these new VST filter baskets when I got my La Marzocco Linea, and I hate them  they say they are 58s but a 58 tamper does not fit properly(tried 3 different 58 tampers to make sure my tamper wasn't the problem)  there is a gap around the edge which creates constant channeling issues.  I have some old dingy looking filter baskets which my tamper fits snugly into.  I have noticed that the size of these older basket is 21 grams while my VSTs are 18.   what do you like to use, and why?   brand recommendations? & any one have anything to say about dose size; I like 18    what do you use 18, 19, 20, 21...   21 creates more volume, is that too much coffee for an espresso or macchiato?    Thanks!!

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