Since the original Hercules had 6 primaries, the Herc mk. II had 4, then the Herc Mk. III should logically have 2, to follow the pattern.
Hamano also did another fighter that looks a lot cooler than the Herc III, but it was never released. :sigh:
We reduced the gun points on the Herc III from 8 to 4 for balancing