Put a bit more reinforcing down around the edges of the middle bulkhead. It feels a bit thin but I will probably only put some surfboard cloth over it and then some thick gel paint and then be done with it. I sanded the hole nicely and the hatch goes in snug. I will paint it with the same gel paint and then fit the hatch with silicone goo or something. The last bulkhead at the back will be tricky but I will do it in small stages. Once that is done then I will start on the side gaps. Probably have to paint inside the cargo space of the bulkheads too. The boat is getting heavier but a lot of the resin shrinks because of the styrene thinner. The new tin of resin is more viscous and might need a touch of styrene. For some reason I have a five liter tin of this. Gonna have a bath and listen to more of Imperium