Northeast Aerodynamics Sportair 40 Build
So the first thing the instructions ask you to do is locate all the bulkheads identify them and mark center lines on them so when you build the fuse you can center them over the plan.
The vertical and horizontal stabilizers are made up of several different pieces I glued them together with yellow carpenters glue. I could have used CA but that would create a high spot when sanded the carpenters glue sands much easier than CA.
Next the firewall is prepared by adding blind nuts to hold the motor mount. A little epoxy on the blind nuts to hold them in place.
The main landing gear is mounted in the wing so you need to add plywood doublers to the balsa wing ribs to strengthen them.
Wing Panels page two