Forum:If you control multiple Cross-Sword Beetles, do their piercing effects stack?

Cross-Sword Beetle states that if you control another Insect, all of your Insects inflict piercing damage equal to the difference; so if you have two Cross-Swords on the field, does your opponent take double the piercing damage from one of your piercing Insects? On a related note, if a Saber Beetle you control pierces a 1000 DEF monster, your opponent would ordinarily take 1400 damage; but what if you also control a Cross-Sword Beetle? Would the Cross-Sword Beetle grant Saber Beetle double the piercing power?