Zen Garden with Crank Handle

I got my inspiration from JustBaselmans thinking “Huh, what if I could turn that with a crank?"

This was an educational project to me as I'm still learning the ins and outs of Onshape. 

It's not elegant, it's far from perfect, but I made it work and it's kind of relaxing. 

Printed in PLA. Use very fine sand if possible. 

Please tell me if tolerances are too tight. I tested everything on my Prusa. 

Assembly

Glue the crank parts together. Glueing the crank and the gear to the handle is optional but recommended. I had to sand the seam on the handle a little bit down as it caused some weird friction. Assemble as shown in the picture. 

(Beware: This shows the gears in motion but a prototype is shown)