For a simple fix:
Looking ahead, limiting AMCs per computer would probably just result in ships with dozens of checkerboarded turrets, which are just as powerful (if placed well), so any solution would have to affect a ship and all its turrets at the same time.
Even then, it wouldn\'t affect someone who launches a dozen fighters with checkerboarded AMCs, so an alternative which might work in all cases would be some kind of linearly scaling decrease in AMC performance based on number of guns per weapon computer, such that no matter how you split up the AMCs into multiple turrets or ships, the performance would be degraded the same amount. Even then, it wouldn\'t address the whole problem (big guns are weak, they only hit one block, they don\'t penetrate, etc, in short they\'re vastly inferior to shotgun arrays).
For a more complex reworking, that thread could provide some inspiration.