I would suggest you don't use the inter rod that came with the plane for the rudder and elevator. It is by far the worse I've ever used in 30 years. It is humidity and temp. sensitive. The slightest changes will completly un-trim the plane. Mine actually locked up on the rudder; when remove it was like a piece of spaghetti. You can leave the outer tube in place and replace the inter rod with 2-56 wire push rods. The plane flies great, good luck.