Since I was getting tired of holding my portafilter in place while it was doing its grinding thing, I thought I could invest 12 hours to design a gadget that holds my portafilter for me and saves me 12 seconds. Such smart.
Anyway, Im publishing this in case someone else has the same issue and the same combination of devices. The voronoi design saves some filament (and a lot of stability, dont squeeze it) but can get ugly at the top without supports.
The design is open source and published to onshape, like all my work, feel free to extend it or modify to your needs.
The author marked this model as their own original creation.