Well after a bit of a break I managed some time at the railway yesterday. The mountain railway viaduct has been fixed and a start made on modifying the road to curve under one of the viaduct arches as per Victoria Terrace in Llanberis.
The viaduct is screwed to the baseboard rather than being fixed to the wall which was another option. This is because in the long term house plans my office and model railway room relocated from a bedroom into a downstairs office space so the railway needs to be built so it can be later moved.
The curving wall shows how flexible an inflexible laminated length of cardboard actually is. The piece is one of the straight sections from when I inherited the railway. Gentle bending between thumbs over the course of about 20 minutes instilled a curve into the wall without causing it to crease. Once the wall has new capping stones and a road I think it will look the part.