[libero]

I'm talking about Lag and Thrust.
On 6th edition page 76 it states: The Power Package utilizes four types
of Thrust:
1. Accelerating (Accumulators driving the Lever Assemblies)
2.Non-Accelerating (Extensor Action supplying Power package Mass)
3.Acceleration Control (Lag Pressure Point sensing Clubhead Inertia)
4. "Centrifugal Acceleration (Centrifugal Force pulling the Clubhead toward
its In-Line condition)

What does that mean,I have to chose one of the above actions and give up
the other three?
And i.e. if I use number 1 above (Accelerating) must I not apply Extensor Action
to my swing?
Or i.e. if I want to use Extensor Action must I forget about Centrifugal Force?
I hope my question is clear enough and of general interest (at least I think it
should be,as i see a lot of fog on that page 76.)
Thanks to anybody that will be able and willing to clarify it.

libero