single dose knock box for sage 54mm basket
thingiverse
See video at https://photos.app.goo.gl/zyDJoH9mhqDfweLc8 The knock box is designed for an aftermarket portafilter that is 1.5mm wider than the original. For the original portafilter it'd be best if you reduce the inner radius if the three "teeth" to 61.5-62mm (at least those are the measurements of the outer diameter of my original portafilter). The aftermarket one I designed for is 63mm. The current design works with the original portafilter too, but is not as snug and the feeling is not as nice.
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