So back to work again...
I filled the two voids caused by someone else's fault

Next i had to get the outer skin ready to attach. it just needed 4 notches cut out to let it sit down over the trailer frame.


then i coated the whole inside of the skin in glue...

i also brushed glue on the inner frame work and screwed the skin on.
Next thing up was the crazy windows... Here's how i dealt with them.
First i grabbed a large piece of 5mm thick perspex from work and trimmed it to fit in the gap between the frame.

then i lined up the outer skin and used the router to cut the holes to match..Love my new router


Next i held the perspex in the gap and ran a scalpel round both sides of all the windows so i could remove the unwanted layers of masking plastic..

then i applied a tonnage of silicone sealant around all the windows

then squished in the perspex, added yet more silicone and squished in the 18mm ply

and screwed the whole sandwich together from the inside

most of the screws will be removed and filled later, but i needed to do it this way to get the silicone to squish as much as possible.
That's mostly it for todays work except i also got 2 layers of watered down PVA glue on all the outer surfaces. hoping to get lots more layers on before the rain returns.