I (quickly) created a bigger model, so you can put your portafilter or any small cup directly under it.
(I mean i like the “design”, but my resize work was rly cheap ^^')
To make it work, you need to tape the button on the top (and push the nozzle into the hole).
You will need to move the portafilter a bit around, to spread the powder. Which is the reason why i stopped to tinker around on a full body box for that.
Sorry for the messy picture :D
The author remixed this model.
longer, bigger output hole