Front bulkhead grooved to replicate planks.
The hatch is 25 1/2" wide and will be 24 1/2" wide when lined. This will allow most standard sized domestic items to be loaded through.
This shows the hatch and slide framing.
The framing is 25 x 50 x 5mm channel and has been drilled and countersunk to accept the wooden battens which will support the cabin lining.
Apologies for another photo of my foot. I am perched on top tof cabin framing looking through a camera and it's a long way to fall with plenty to hit on the way down.