I usually build the wings first; I get bored with the repetition of all those ribs and want to get them out of the way. I also build both wings at the same time, so I can build them identically; I'm always reinforcing or changing things a little from the plan, so I want to be able to incorporate the changes the same way on each side. Then I build the tail feathers, then the fuse. I will dry fit all the servos and mount the flight controls to ensure proper fit and function, then remove the servos until the plane is covered.