Several weapons allow one to roll "extra Damage Dice ... against every model within X" of the centre of the model its first Damage Dice is allocated to."
If the first Damage Dice is allocated to a tank or something larger than 2X" across, does that nullify this effect because no model can be X" from the center?
If the first Damage Dice is allocated to a tank or something larger than 2X" across, does that nullify this effect because no model can be X" from the center?