Im goign to be doing a fiberglass set up not sure ported or sealed yet. the box is going to made out of mdf and the fiberglass will be like a cover bolted to where the subs screw in and to the hatch. heres ,my problam not sure what im going to do if i have to go with a slot port like how am i gonna be able to fiberglass around it and connect it to the box so it dont vibrate.