Game balance wise, 'cost' really doesn't mean much... maybe in a tourney, ala Trillion Credit Squadron, but even then the weapons costs would be small fry at this scale.atpollard said:...
I would also suggest that a small cost penalty be applied - perhaps no 'standard design' discount for the ship or even double price for an experimental prototype.
In other words, no free lunch.

Hence the suggestion about additional tonnage/hardpoints. One could go further on rate of fire or some such, but then I think the OPs idea is that there is some not insignificant advantage given the above average TL.