Action-reaction
The relative rates of spin (in relation to the earth) will be inversely proportional to their respective moments of inertia (the rotor system and its turning bits) and the fuselage. But that's in theory... in reality, the relative rates will differ from those theoretical values due to aerodynamic forces.
crab-
I'm sure that works, but I think I'd prefer to watch you do it rather than try it myself.