I have seen the servo jitters also . I got the 811's and the r700 when I bought my 8103 also. I hd them im my ultra stick and the made all kinds of noise and moved aournd alot so I took them out. I never knew what the problem was. I have them in something else now but using a hitec reciever on them and they are nice and quite. I figureed it was some kind of radio interfernce.