I am currently building and researching the Castleman's Corkscrew as I am build an N-Gauge layouts of the Holmsley Station Area (the old station house is now a nice tea rooms on the original site).
What I am trying to identify is the coaches that were used for the M7 Push/Pull. I have a selection of coach set numbers 383, 385, 604, 608, 611, 612 and 662.
What I now need to clarify is if the Port d'Etropal 3D Printed versions are suitable and if they are what bogies and undercarriage would be suitable. If they are not suitable any other options that can be suggested would be helpful.
I have added some pictures to help: