NOTE FOR CONSTRUCT PRINTER: plz keep the infill at 13%, 

HERE is the assembly process:_

NOTE:-Assembly process may require some force.SO, PROCEED WITH CAUTION.

1.First Step:-

   insert the forward into the rear part using the premade pin.

 2. second step:-

then slide in the primary wings into the slot of assembled fuselage

3.step

then slide in the remaining wing into the primary wing 

4. 4th step:-

                    slide in the engines using their pins

5. 5th step:-

              insert in the canards into the slots inn the front part of the fuselage

Still didnt under stand, Watch here:-