composites are useful to use as a wall 'key' to ensure that all team-mates get the right pen weights/hatching/width correct from scratch - in some ways quicker to use for walls than favourites because they can be chosen directly from the info box.
also - by using composites for even single skin wall construction types, you can control the fill direction and ensure that the fill remains perpendicular to the wall at all times. very useful on a complex, non-orthoganal building.
(possible tip djordje? )
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