This is a tamping station for the Breville 58mm portafilter part number SP0001817. The STL is a little snug for the Breville 58mm bottomless portafilter BES058NP and later models of SP0001817, so print 4% larger.
The Solidworks file for the portafilter is not exact, but it was good enough for me to get the cradle seated fairly well.
portafilter_in_station.SLDASM | 387.3KB | |
portafilter_mockup.SLDPRT | 5.2MB | |
tamp_station.sldprt | 262.6KB | |
tamp_station.STL | 385.8KB |