I recently put some new servos and a cc bec in. It is currently running with 2 toward pro 996r, but it does this with the stockers too. When I pull about 130 or more amps (tekin rx8), the servos jump to the left. I can physically see the wheels turn, so I know its not an alignment issue. Its not a battery amp issue either, they are spc 2s 8200 with plenty of grunt.
Im going to be digging into it tomorrow for a few other wiring options, but Id like some input from anyone else who may have some insight. I suspect Im getting a dirty signal from a brown out (from what, I dont know) and wiring the power directly to the Rx will help.
Im wired like this currently, except the signal and power is split from 1 channel to both servos @7v.
(credit to Scaniris for drawing this up)