I have two RCGF 20 cc engines and use golden rods on both of them. The throttle arm is too short on these carbs for precise throttle control, so I made longer throttle arms out of aluminum, over double the lenght of the original. Also you need to set up your linkage so you are getting less movement on the low end and more on the top end. Set your servo arm up so its moving about 45 degrees to the line of movement of the rod at the bottom end and near 70-90 degrees near the top end. That way it wont be too sensitive on the bottom end and more responsive on the top. Have not had any problems with the plastic push rods. I use both a 2.4 radio and another on channel 17 and have had no radio problems.</p>