A detailed assembly guide can be seen in the video below:
Please be aware that the set screws in the hubs for the wheels need to be tightened very carefully but with a lot of force to keep the hub onto the motor shaft. We recommend applying a little drop of Locktite 243 or similar before tightening the set screws. This should resolve any issues with the hubs coming off due to the constant change in motor direction when stabilizing. If you are experiencing the wheels falling of the robot after some use please re-tighten the set screws and apply Locktite.
Unfortunately due to export constraints of liquids the Balanduino does not come with any Locktite. You should be able to find this in any regular hardware store.