As Fred said, you can assemble the wings without having any of the radio gear or the motor. One of the very first steps when starting to build the fuse is to drill the holes for the motor mount. If you use the supplied mount, you are going to need the motor you will be using on the plane to get the spacing correct. Well, you don't need the motor, it just makes things a helluva lot easier! Once the holes are drilled in the firewall and the blind nuts are in place, then you should be able to proceed with the build until almost the very end.