i'll try a 4.8 volt battery and if the twitch goes away i'll purchase a voltage reg. to control the excess voltage, The servos repond fast at 6.0 V. i also had a friend tell me that control rod binding can cause a twitch. That doesn;'t seem likely as all the servos are jumping like frogs at 15 paces. I ran the voltage down to 6.3V and still had the problem. I am going to help my friend with his vinyl siding project this weekend, but will get back to the forum on Monday. Thankyou to all. Groundkeeper3404