For when you run out of Aeropress papers and the surly barista down the road refuses to spot you a couple filters.
Double fold, insert the corner into the guide, pinch and cut around the edge. The edge is sized at 6.3 cm which is slightly smaller to accommodate the gap when using scissors over a precision/utility knife. If still too big you can scale the print down 5-10%.
Cheers
The author marked this model as their own original creation.