This is a tamper station for quickmill portafilters plus a stand for your tamper - the tamper cutout is meant to hold my scarlett-espresso "puck" rubber stand, which can be taken out for cleaning.
As we all know the recommended pressure for tamping is 14kg, so I had some doubts regarding stability, but with 20% infill this thing is solid as a rock.
I also designed a second variant, which i personally like a bit more designwise, but this one seems to work a little better.
Affiliate Link to the rubber Mat
Polymaker Polymax PLA