technical grappling, whole body CP and dodge malus

[Devil_Dante]

hi everyone!!

Asking for your help about control points and the malus they deal to dodge.
I m trying to figure out if i have understood the mechanics right, especially the ones concerning whole body control and how everything fits togheter.

For what i have understood, only the CP of neck and torso deal a malus to the dodge (and, of course, to resist to knockdown, because all rolls are quick contest, based on ST or skills). So, referring to a case where you are grappling an opponent's leg, for 10 CP, the referred control points on torso and head/neck will be 5 and 5. But, if your opponent tries to dodge, he has a total of 10 referred CP and thus -5 to ST and DX= -5 to dodge.

Is it right??

Assuming so, let try to make it harder. Now i'm going to grapple both arms of my opponent, the right one for 8 CP and second for 4 CP. First of all, i find the whole CP for every location

1) right arm= 8 CP 2) left arm= 4 CP 3)torso, legs, neck= 6 CP

now, because the sum of grappled parts (arms) is 12 and both arms have more than 12/4=3 CP, they strenghten themselves for 3 more CP

1)right arm= 11 CP: -5 ST/DX 2)left arm= 7 CP: -3 ST/DX 3)torso, neck, legs=6 CP: -3 ST/DX

Final dodge malus= -6

Is it everything right??

Last thing i m been asking, Trained stenght used for quick contests, is the one calculated via table at page 47 in technical grappling right? so, if have 10 of strenght, with Amr ST 2 and wrestling at DX+4, and i'm grappling with both hands and legs, i have= (10 ST+ 2 arm ST) * 1.5 both arms and legs multiplier + 3 for wrestling (fast training)= 21.

If i'm trying to arm lock, my quick contest roll in this case is 21 ( my training ST).

Did i do any error??

thank you for answers