left side closed in

The planks on one side are all on. After adding enough planks to cover the centre line and dutifully marking it I got to trim it flush.

 

marked centre line

 

I had transferred the centre line up from the station molds with a small jig and joined them with a straightedge.

Most of the waste I hogged off quickly with my knife. Then I carefully pared to the line with a chisel, working from the middle to both ends. It ended up being a very fast operation.

 

centre line trimmed

Now the job of stripping becomes much more fiddly. Each strip has to be carefully fit and trimmed at both ends to match the angle it intersects the centre line at.