CRAM/plasma barrels are weird in that they always stay upright, regardless of the orientation of the vehicle/subobject they are attached to. On its own, this is a fairly negligible issue, but when decos are involved, this can become very noticeable, as they will quickly become misaligned.
There are already a few toggles for aesthetic barrel effects (APS multibarrel rotation+spacing, railgun rotation, cram reload rotation, etc.), so an additional toggle to have CRAM/plasma rotate properly (like how APS already does) would be able to solve this issue, while still giving the option of always staying upright.
#CRAM/plasma "always upright" toggle
lucid frost
opaque lantern