hahaha....
i'm sorry. but i'm really a newbie in building robot.
my choice is only to learn anything (such as that fancy CBM) to reduce the required torque on the shoulder.
of course.... buy a bigger servo is always an option. add more $$$ to spend 
unfortunately i can't find any cheap hobby servo bigger than 180kgcm (with 12bit magnetic encoder) and easy to code using arduino IDE.
that's why i came here for CBM and asking could it be CBM as simply as adding that funny spring or shock absorber? 
so far as i found by now, CBM is about posture of the robot to reduce the required torque.
wrong again?
then please kindly give me a direction or clue