well i have been building the box for the Fi 12" and i have some questions, do i need to use 2 pieces of wood (3/4) for the "faceplate" is it necesaty if is going to be facing to the bumper, also i already made a cut for the sub in the middle and im going to have a port nex to the sub but wanted it to be simetrical, any ideas i can do? if i put 2 ports is it really have to be longer than 1 port?