Ok lang yung na compute mo.. the displacement of the sub won't really affect the enclosure size. Yung JL10w7 na sobrang laki 0.09 lang ang displacement.. sigurado maliit lang ma- occupy ng targa

you can use nails or screws.. the purpose of these is to hold the mdf together when the wood glue is drying up. The strength and secret of the box comes from the wood glue and not the nails or screws.

If you're going to use screws, be sure to pre-drill the hole. Don't forget to use sealant on the edges