The centre section steel spars had to be replaced, as were the wing spars. Most aluminium parts were reused together with the internal wing structures. The hydraulic and fuel systems were preserved intact. Original electrical components and instruments were sourced.

Meticulous attention was paid to restoring R4118 exactly as it had been flown in the Battle of Britain. Even the original VHF radio and Identification Friend or Foe equipment were found. The original Browning .303 machine guns were reconditioned before being de-activated and refitted. The airframe was covered in original Irish linen and painted by Vintage Fabrics.

The early Merlin III engine was rebuilt by Maurice Hammond. The Rotol propeller was constructed by Skycraft and included new original-type wooden blades.

During the rebuild, every component was subjected to the rigorous demands of the Civil Aviation Authority, ensuring maximum safety and durability.