Two bass bins now assembled sans outer baffle.
I wasn't quite careful enough drilling into the ply, so it split apart. I used polyurethane glue to repair it. In the past I've used PVA but it's difficult to get the glue in. With PU glue it expands to fill the void, so that it pushes the glue both into the void and out. The glue seen on the outside is there only due to the expansion. This glue is four times stronger than PVA.
Driver cut-outs were done with a router jig: