Realistic Artillery Management - FOO Rule

[Imp]

I agree if place all in same hex & get 300m coverage thats fine & adequate for game purposes.
But I still think should be able to place adj say a 3 hex cluster all touching for simplicity.
Better would be all spaced round & adj to target hex.
This gives 2 fire options spaced & tight so if FOO has a LOS so gets tighter spacing of rounds he can at least compensate.
You are risking him up front & for certain target types a LOS is a penalty due to lack of spread