Hi Joe Jr
I think you issue with buzz is as wfield has pointed out that your frame rate is incorrect, set it to 17ms or perhaps auto in both the Sats/R3s, FS off then set 17ms-Auto in the CB200 (set any FS needed in CB200) and try again.
As Wified mentioned "please" dont run a hi powered servo from your sats/R3 output, you might get away with a std low power servo on a non critical function that dose not require FS
Another issue might be is that JR 8911 servos are defanatly not HV? There up to and not more than 6v, running HV will undoubtedly cause issues especially buzz.