Baratza Vario parametric portaholder

I wish I had coffee grinds filament for this one ...

Baratza Vario is such a nice coffee grinder but the portaholder design is ... less than ideal: makes a mess everywhere, can't hold the portafilter by itself and breaks easily.

I designed this portaholder with a funnel for my 58mm Breville portafilter, but the design is OpenSCAD parametric and can be adjusted for a tight fit for a variety of other portafilters.

Features:

the portafilter fits tightly, doesn't let coffee grinds fly all over the kitchen
you can leave the portafilter in the holder (one handed operation)
you slide out the portafilter and this makes the coffee come out evenly spread
it snaps tightly into the Baratza Vario notches
I debated whether I should add a tray at the bottom or not (because there will still be coffee or water drips) but in the end decided to save plastic and print time.