Breville Sage 54mm Bottomless Portafilter Tamping Station
thingiverse
I made a very quick tamping station that utilizes the 9-prong WDT (https://www.thingiverse.com/thing:4819617) as well as a distribution/leveling tool (it's a two-in-one with calibrated palm tamper) and the rubber tamping base it came with. There are a couple of versions in case you printed the 9-prong base that is octagonal in-lieu of the circular version I seemed to have printed months ago. Also a version for your 53mm tamp, it's a 54.1mm tapered opening so should be plenty of room to fit your stock Breville or third party tamper.
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