Funnel is for crankhandled Coffeegrinder with flat Top.
Stamp fits theoretically each Coffeepowder portafilter.
Maybe the Stamp .stl needs to be scaled to your Coffetrays inner Diameter in the Slicer. Amount of Infill doesent really matter. Save as much Filament as you feel good about.
.stls are prepared for 0.4 Nozzle, 0,2 Layer, any Filament should work.
The author marked this model as their own original creation.