A play with multiple gears.
It's really funny to play with it!
Update: Gear with a knob
Update 2: Gears with different shapes, gears with "k" at the end of the filename fit stronger in the plate
Combine two or more plates with the expansion part.
After first layer, print with highspeed.
Print two or more gears at the same time.
"k" - Files: use a fine sandpaper to adjust the pin.