Thanks Malcolm. The first free afternoon I have I will sit down and fumble through this. There is no clash with anything yet as this is the first thing I am trying to program. Everything else is straight forward. It is a Space Shuttle. So a delta wing with one elevon on each side and the split rudder on the vertical. That's it for aerodynamic controls. The other controls Are throttle, steering and retracts. I have no problem without rudder trim or steering trim. I can do any adjustments with the linkages, ( Old School). I'll try and take a few pictures of the project and post them here.