Fitted the skylight and more windows...

My first step was to put up trusses as I needed to glue an extra layer of material on top of the roof...

 Concrete sidewalk/garden slabs serve as "weights" while the glue is drying

Fitting the skylight (from inside)

Done !

Glue the door for the chemicat toilet - A strap keeps it in place while the glue dries

 Done!

On right-hand side of truck, I had to fill-in a spot where a rounded glass window use to be...

... simple with GRP and epoxy!

Done! - Right hand side

Left hand side...