We are getting a lot of rain out here and I have not had much time to work on the van. I did finish the passenger side wall. I screwed the wall onto the van while the glue was still wet. It worked out very well, the walls dried to the curve of the van wall. Taking them out was easy.
I added a brace behind the wall so the edges will line up even.
This is a shot of the window sill cut to match the curve of the wall.
Finished product.
The driver side went faster, since I now know the issues that I have to deal with. The only hard part was the first piece goes all the way around the window. I was able to use the first layer of foam board to create a template.
All I have left to do now is to take down the section around window and cut the window sill to match. Glue, screw and re-install.