When I was assembling I made a silly goof , I didn't get the rudder in the rite spot so when I was setting up the radio the rudder push rod was hitting the back of the seat so I cut it off about 3/8 of an inch ..Of course the rudder would not work and when I took it apart and reassembled it correctly now the push rod is too short ..I had to move the rudder servo back about 1/4 inch so the push rod would catch....Silly me...I should have knowen that something was wrong when the push rod was hitting the seat...