Good morning all
The bogies are a problem. There is much discussion as to which bogies were replaced by 10ft heavy bogies.
The Isinglass drawings show 10ft HD bogies fitted on the restaurant triplet and 8ft6ins HD bogies for the rest.
Isinglass drawings also show 10ft HD bogies fitted as middle bogies on the Coronation twins which included a kitchen, with 8ft 6ins HD bogies for the rest.
I don't know of any supplier for the 10ft version of the HD bogies.
I suppose that one could "cut and shut" two cosmetic 8ft 6ins HD bogies, and fit them to a 10ft bogie frame as supplied by Dart castings.
A very interesting and informative thread.
Earlswood Nob