Zemanski99, Everybody brings up some valid points that need to be followed through on. Like to know if anybody else at your field has had the same problem to one degree or another. We all fly in RF enrich environment. A new cell tower in your area that your not aware of could cause that, but don't understand why it effects only your elevator channel. Frustrating I'm sure. I start with a new good quality servo, tight conections from servo to receiver. If others in your club have experience the same or similar problem, look into the environment.