  It is shown that flows in precessing cubes develop at certain parameters
large axisymmetric components in the velocity field which are large enough to
either generate magnetic fields by themselves, or to contribute to the dynamo
effect if inertial modes are already excited and acting as a dynamo. This
effect disappears at small Ekman numbers. The critical magnetic Reynolds number
also increases at low Ekman numbers because of turbulence and small scale
structures.
