On the second check, if both systems fail, it won't matter if your hand is on the stick or not. If it doesn't move, no problem. If it does move, you won't be strong enough to stop it. Your instinct then should be to undo the last switch selection you made rather than fighting the controls.
What you should do is keep your left leg lightly touching the collective so that you can feel if there is any unusual movement.
I doubt if the check is valid at low rpm because the loads are appreciably different. If it is valid, the possible uncommanded movement of controls at low rpm could be quite damaging.
I'd recommend sticking to the manual.