Welcome! i bring you and original make, the r2d2 grinder, with magnets, an antena for rolling and a weed deposit!
It prints in about 3 to 4 hours
For the assembly of the mid and top part you need an O-ring of 38 mm in diameter, this will fix the mid part rotation with the top part in order to grind, but you can still remove it if you want to use the cabity as a deposit for weed.
I also adedd 2 neodimium magnets of 5x2mm on the spaces i left in the bottom and mid part for a nice clossure.
It grinds super nicely and the antena is designed with the perfect diameter and lenght to help you roll and push the weed/tobac into the joint.

Enjoy!

Creality

Ender 3 Pro

No

Yes

.1500

20

Give a 30% speed to the first layer due to the complex supports for the mid part (it has to be fairly precise in order to grind properly)

it also works in .2000 and .2500 resolution