Fixing the two sections of the superstructure using nut/bolts om the underside & also some Gorilla (Clear) Glue then using clamps to keep the parts tight while the glue sets.

       

Finished trimming the bottom edge of superstructure so it sits on the deck flush
                       


CABIN
I made the cabin out of 5mm ply, it was a little tricky to get it to sit flush on the deck, but after a lot of sanding, it now sits nice & flush with the deck!