I have some pics.
I ordered two pre cut 9cuft cabinets and started assembly.
This is the cross panel to hold the braces as you will see.
Side brace. I made extra holes to add alittle more volume.
This the combo baffle/rear brace.
I made 6" port hole using a jig saw for a 24" PVC.
Front and rear panels/brace glued and clamped.