Check for assembly accuracy and degrease before assembly. Remove sprues with saw / cutter. Heat distorted parts under a light bulb (60W) or in a water bath and bend them. Work carefully! Glueing with 2K or superglue.
Screw in the two lower ends of part 3 by 90 ° and glue them to the bomb body (just above the horizontal groove).
For part 2, also screw in the ends and guide one leg through the loop of part 3. Then stick to the bomb body. Attach to the loop, where both parts are nested, with some super glue. Make sure that both parts are at 90 ° to each other.
Now carefully bend part 1 (windscreen) over a round material and glue it together at the overlap. Then slide over the two brackets and fix from the inside with adhesive.