RE: Hi Tech receiver & other servo brands
I bought 7 Cirrus servos once. Once! 2 of the seven were good. They chattered too. I had them on an Ultra Stick 120, the older version and I think I was using a JR 700 slimline reciever and they wouldnt stop moving. I just took them back. And used the other 2 for stuff like throttle or on RC trucks.