I have an idea and would like to see what you guys think of it. Would it be possible to build a box to go along the accessory rails on the ‘04+ F150’s? The box wouldn’t be very deep (about as deep or maybe a little more than the standard CD holders, etc that attach to it. Basically deep enough to house the speaker. The box would probably have to be ported due to the lack of airspace. I was thinking a 6x9 or two. Maybe even a 10, but I bet a sub would be too deep. Any thoughts on this, have you heard of anyone trying this?