RE-DRILL FIXING POINTS
Unscrew the bottom and flip it over. TARAH!! All the positions of bulkheads appear in exactly the right spots, now predrill them so you can screw them in easily later.
If you wish, now would be a good time to start pre-coating what will be the inside with epoxy. You can save a day or so if you can glue it all down without having to wait for the epoxy to go off.