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Glad to hear you like it. It was fun to design. I probably printed enough parts for three of them by the time I got it all working just right.
Sorry to hear that the gears are not working right for you. It sounds like the pins for the gears might be too loose. They should be able to turn , but the gears should not wobble. Watch the video where I use a motor to see how they should turn.
I would try printing new pegs for the gears. If you need bigger ones, the "pin connectors V3" in the remixed from section, has a customizer that you can use to make different sized pins.
Goid luck! Let me know if that helps and post a make so we can see how great it looks.