I'm experimenting with HDD Servos on my InMoov, using them in place of the HS-805BB to stop the buzzing under heavy load.
I started with the Elbow servo and it seem to handle the weight etc, and no buzzing when holding up the arm, unlike when using the HS-805BB servos!
Seems to work well.
See quick video
I'm not sure if they will be able to handle the shoulder/arm servos, but the stall torque figure of the HS805BB is 24 kg/cm against 19 kg/cm for the HDD servo at 6v, not much difference between them?