Kinu M47 Phoenix XL Grounds Cup

Looking for a larger grounds cup for the Kinu M47 Phoenix? Me too. So I made one. Holds over double the original cup, more than enough room if you want to fill the entire hopper and grind two servings at once. 

Use the oring from your original grounds cup. Will work on the Phoenix, and should work on any of the other models that use the oring grounds cup. Bottom is non-removable. 

Print instructions:

Layer height 0.2mm recommended. 2-3 perimeters should be fine for the walls, no infill needed, and aligned seams look best, but if you choose nearest it will produce a cool spiral effect up the cup. Use a height range modifier to print the top 1.5 cm or so at 100% infill for strength. You can also print the bottom at 100% infill using another height range modifier, but it's not really necessary. 5-6 solid layers and rectilinear infill should do the trick. 

I used PLA for this, although PETG will suffice as well. If you have issues around the oring try using thick bridges or decreasing your print temp slightly. If the fit is a bit loose or tight you can also try printing +/- 0.5% or 0.25% scale. I've also included the .stl if you want to make any edits as well, but please share alike!

Post processing: (VERY IMPORTANT!)

Since this is a food contact print, I highly recommend to coat or epoxy the inside with a food-safe coating before you use this. Without it, dry coffee would get into pits and voids which may not end up being a problem with regard to bacteria but it could make your coffee taste stale. Get some food safe epoxy to coat the inside and paint a thin layer of epoxy around the outside upper lip where the oring sits. You may desire to paint the rest of the outside with epoxy or a food safe paint as well. When finished, let it drain upside down and check for bubbles, pop any with a hair dryer. Give it a couple days after it's dry to air out (it may smell a bit at first), give it a wash before first use, and you'll be all set to use it safely and wash whenever needed! 

Just for the record (I know, safety warning blah blah) if you choose not to coat proceed at your own risk. I'm not responsible if you run into issues using this without a food safety coating. 

Additional tips: I've also taken the liberty of adding rubber bands across the entire grinder and cup. Works great for added grip! The top cover is a piece of flexible thick vinyl plastic from an old binder I cut into a donut with a tab to prevent beans from jumping out.