Largely mechanical and calibration. As soon as you have the acceleration/torque and timing accuracy you need, the rest is in the calibration. For example, you need to overturn and then backstep for maximum deacceleration and precise landing. This is highly dependent on the type of plastic, wear and tear, and even temperature, which you would need to take into account if this needs to be reliably in an industrial environment. And then there is plastic molding imperfections that could mess with the calibration.
I bet centripetal forces are also quite significant in this case, nearly tearing the cube apart. Good speedcubes are very easy to disassemble accidentally.
I bet centripetal forces are also quite significant in this case, nearly tearing the cube apart. Good speedcubes are very easy to disassemble accidentally.