This thing is a tribute to Jeremy Elson who had the great idea to design a desktop Shishiodoshi *):
The main difference with Jeremy's design is the way of filling the duct. Rather than using a fountain, the water is directly injected into the duct. To have the right balance, a (very) short M12 bolt with a nut added is pressed into the opening in the inside bottom of the bamboo duct. The M6 bolts will tap themself into the support openings. It makes sure the duct is in the right start position.The tube to the pump has to be very flexible. PVC is far too stiff. Silicone is very flexible and should be used in this thing.
Slicing the bassin takes some time, be patient. Infill for the bassin and bamboo duct is 50%(recomendation) because of water tightness and strength of the supports.
You want to print a pump yourself? Try this excellent design:
I included a pump cap to hide (and protect) the motor. A separate tube adapter has to be bonded to the pump outlet to make a better fit with the tube.
Use some kit (solvent adhesive) to make the tube connection to the bamboo duct and the wire opening in the motor cap watertight. In case you want to play with the dimensions, the OpenSCAD files are included.
If you want to see the video, remove the quotes. This is to prevent that MakerBot overrules my prefered settings.
*) an ancient Japanese way to frighten away animals.