I can suggest a single elev set up.. just join the halves with a " [ " shaped wire or I ended up using a piece of carbon fiber tube.

As far as a fuel tank set up it all depends. I tried valves and regulators, but the only thing that seemed to work was lowering the tank outlet to be level with the carb slider. Some guys had no trouble at all.

Not sure about throttle servo... I used a HS 85 mg in the stock location.

Radio mixing is up to the individual flying the plane. I fly with no mix only expo.

Really go through the thread.