Servo problems

[JUS4SHO]

Good day all

i am having a problem with my radio ssytem
i have a dx3s with sr300 rx, hs-7955tg servos and mmm2200 sytems in both my Xray 808e & inferno gt2 BL conversion.
the problem i am having is that at times input to the steering wheel does not register with the servo , i would turn the steering all left the wheels might deflect 30 deg's then glitch then it might go all left or remain there other times a quick left to right on the steering wheel of the radio will result in no motion of the wheels. Could it be that the servo requires more power than the BEC is putting out of the mmm? do i require a SPM1600 cap or a novak glitch buster (i know the both work the same). I am asking this as i would use the radio with my other units and did not have an issue, i have even switched the rx an no issue, So i have isolated the issue to the servo , is it that i am so unlucky to get 2 bad servo's, any help or advice would be welcomed