I know this doesn't fall under the realm of off-roading but I know that most of you are toyota owners and you can relate. I myself love tunes in my truck. When I bought the truck I have now it already had a cab cutout for a speaker box however the box he had in there was cheap plywood. I want to keep the cutout and make a nice box and put some good sounds in my truck. Does anyone have any suggestions? Done it before? Know where to have a box built? Have any ideas on how to seal the area between the cab and bed against water? I would appreciate any suggestions.