Before assembly, check the fit and remove the release agent with isopropyl alcohol or acetone. Cut off sprues with a saw/cutter. Wear a dust mask or respiratory mask when machining to avoid inhaling dust particles.
Carefully heat warped parts (e.g. with a hairdryer) and bend them into shape. Glue with 2K or superglue. Unpainted cast parts darken over time and can turn yellow - especially when exposed to UV light.
Separate the four tail units (1) from the bow and slightly buckle horizontally. Turn the rivet strap to the left. Glue the parts one after another with superglue into the slots on the bomb body and bend the upper corner of the baffle slightly to the right (for the spin when flying). Now remove the eight rivet straps (2) and glue them on the left and right at the bottom against the tail. Finally, drill two small holes (0.4mm) for the pins (3 and 4) and then glue them in place.