Another hole in the hedgerow

[leonard]

When reading about the future "American D-Day" PG game, I realized there should be a lot of hedges in that game.
Hedge rules are a problem. 
In "Beyond Normandy", "Liberation 44 1st Ed" and "Fall of France 1st Ed", the rule says you may fire through 1 hedge but not two (except if the hedge is part of the spotter or spotted hex).
In 4th Ed Terrain Chart, it says something different like : "...units not adjacent to a hedge hexside can see the hex immediately behind the hedge and no further if they are within three hexes."

The height of hedges is never mentioned but I suppose it is lower than woods or towns ( < 20m). So, these rules are probably not true when firing from a hill OVER hedges.
Furthermore, that "three hexes" rule does not seem to be understandable to me. 
I propose to replace the rule by something like :

Hedges block LOS at ground level except when firing unit and/or fired on unit are immediately behind a hedge. Any unit immediately behind a hedge is in Limited Terrain.