I really like this message board because the members are so polite, but every once in a while I read a post that just leaves my mouth hanging open. This is the post. Are you nuts? Didn't you CHECK the controls after you changed the radio? Changing a radio is major surgery and you should check everything (including range) when you finish. You got lucky -this time! That spinning disc on the front of the plane can seriously hurt you. Be careful! There's nothing in this hobby worth dying (or losing limbs) over.