Origami Dripper: Ultimate Field Guide to Geometry, Filters, Flow, Grind & Recipe Matrix (with Troubleshooting) Contents 1) Geometry First 2) Filter Papers: Types & Fit 3) Flow Targets & Timing 4) Grind Matrix (EK / 64-mm flat / conical) 5) Pro Recipes (light / medium / dark) 6) Troubleshooting (collapse, stall, sour/bitter) 7) Further Reading…