Never let the rotor rise or the free wheel disengage in a quick stop. It's a fine line between nose up pitch and descent rate. The more the nose rises, the less descent rate is acceptable.
A graduated entry with small corrections early and a progressive increase in collective pitch is better than an aggressive entry with a descent and a large collective increase as TL is lost especially where the engines are idling due to free wheel disengagement.
I always get nervous with students who try to recover to a descending hover at the end of the maneuver. Stay at the entry altitude or climb. Never descend. If you mess it up, throw it away and nose down to accelerate again. SF troops are harder to replace than most pilots.