Well guy's i got a 93 explorer i had 1800 in power to my hdc3 18" before was flexn roof so now going to 3000 in power i know that flexn of roof gonna be worse. I know that sound deadner will kinda help but not all that great. Because explorers are known for a poor roof construction itself. Orignally i wanted to make a brace welded across roof or some type of welded support. But another member had told me i should because that will putting me into an extreme class. So Besides deadner anyone got any suggestions or secret's they seen done or used for explorers?