1. Pull off the existing corridor connection. Paint the replacement corridor connection and end plate.
2. Remove the body from the under frame. Glue the replacement corridor connection into place. With a 2mm drill bit, drill a hole through the centre of the corridor connection and the carriage end. Reduce the spring to two thirds of its length. Place the spring over the end plate spigot and fit the end plate into the corridor connection.
3. From the inside of the carriage, push the fixing washer over the spigot so that the end plate extends 1.5mm from the concertina. Adjust the attitude of the fixing washer so that the end plate is equidistant around the concertina.
THE CLOSE COUPLING BASE PLATE
The buffers have been replaced with ABS white metal square shank round head buffers.
The base plate just drops in without any modification, glue it into place.
the coupling is cut off the bogie.
Glue a piece of 10 though plastic strip here to remove the end float of the draw bar when on a curve.
File out the delta plate. This is to ensure the wheels are not fouled by the the draw bar.
Leave a small pip on the back edge of the draw bar.
This is to ensue there is minimum end play when the draw bar is being pulled.
With a fine parallel needle file open up the gap under the locating finger.
Ease the locating holes of the female coupling plate and countersink the top of the hole to make coupling the male plate easier.