I am already wanting another light. So, I have a question that has been posted in one form or another and Im reading different answers so....I have a Regular Quark AA2 and a Tac tail cap. If I buy a Quark AA Tac can I change out the heads and have a AA2 Tac and a AA regular? Im just looking for the short yes or no guys. As soon as I get the info I am pulling the trigger on my next light.