The lower V shaped housing is made from styrene sheet while the small top one is brass sheet. The gears are from watch/clock parts. The main large support which mounts to the fuselage is made from 1.0mm thick styrene sheet with 0.5mm copper wire fitted for the mounting brackets, these were flattened and a 0.3mm hole drilled, I used a 0.3mm brass pin to secure them to the fuselage with CA.
Des.