A simple suggestion, one that has probably been done before, is a bay splitter, that allows a single internal bay to be separated into a pair of the next class down. These would be most useful for limpet controllers and scanner hardware. Other uses might be optimising space around an SRV bay or SLF bay in cases where the best fit bay for these is a class too big. This would allow the other half of the space be used for cargo or hull/module reinforcements.
The other suggestion is a weapon hardpoint splitter. essentially a common armature (Easiest implimentation is probably the armature that the AX missiles come mounted to,) onto which a pair of smaller weapons (class 1 for a class 3 mount, class 2 for class 4) can be fitted. In most fixed hardpoint solutions, the larger weapon would probably be superior, however, for turrets, a paired mount of smaller weapons may prove superior. In particular if said mounting didn't suffer the -20% damage penalty. Piercing would be affected, though raw dps would generally work out to about the same. It would also allow for paired rails or class 2 plasma on turret mounts, or the use of turreted multicannons on large and huge hardpoints.
On the topic of turreted weaponry, an observation: Most people probably don't make a lot of use out of turrets, because every weapon mount on every ship is aligned to fire forward. Some ships have hardpoints that might be useful for fitting turrets, but this detracts from forward firepower.
The other suggestion is a weapon hardpoint splitter. essentially a common armature (Easiest implimentation is probably the armature that the AX missiles come mounted to,) onto which a pair of smaller weapons (class 1 for a class 3 mount, class 2 for class 4) can be fitted. In most fixed hardpoint solutions, the larger weapon would probably be superior, however, for turrets, a paired mount of smaller weapons may prove superior. In particular if said mounting didn't suffer the -20% damage penalty. Piercing would be affected, though raw dps would generally work out to about the same. It would also allow for paired rails or class 2 plasma on turret mounts, or the use of turreted multicannons on large and huge hardpoints.
On the topic of turreted weaponry, an observation: Most people probably don't make a lot of use out of turrets, because every weapon mount on every ship is aligned to fire forward. Some ships have hardpoints that might be useful for fitting turrets, but this detracts from forward firepower.