There is no 1/8" birch in my area so I used 1/4". I tacked the panel on the back end and all seemed well until I got to the bottom where it did not want to bend. First lesson I learned was that I should have removed the panel and kerfed it and put it back on but I attempted it with it on the trailer. It worked! Would have been easier and neater on a flat surface, like I had practiced before the attempt.
I did not kerf the top of the panel and I left it for almost two weeks until I got back to it. There was nice bow in the top. I will attempt to kerf it today so that hopefully my window frame will go in without a bow in it.
Kerfing with a 1/8" router bit and a dremel router.
Got the bottom nailed down, thanks to the palm nailer. I attempted it with a hammer before my palm nailer came and it was next to impossible.
Here's some more pics.
Here you can see the space before I nailed it. I added welting. Originally, there was none here and there was a collection of trash in the crack. This is also the spot where the original panel was glued and nailed. I contemplated a bead of Liquid Nails but it fit so snugly, it wasn't necessary.
Here it is after it conformed to the curve and was nailed.
Outside, also shows the funky bend in my frame.
I also cut the top piece of the back end that goes over the window but I will kerf it BEFORE I put on the trailer. Had a cold but clear and productive day but we have 80% chance of snow tomorrow...then snow... then cold.. then more snow, and more snow.. and then I'm spending a week a lot closer to the equator. So, I probably won't get a lot of work done on the trailer for the next couple of weeks ,
You can kerf with a skil saw too, if you can keep the birch flat. I have a sheet of 3/4, whatever they call that sawdust-and-glue plywood, the really heavy stuff, that I cut birch on, it makes a great table top to keep the birch from bending. I cut right through the birch into it, helps keep it from splintering.
'76 Shasta 2250 kept in a perpetual state of restoration. That way I don't have to buy any more campers