Engineer

Interesting project, one to follow.

The Metropolitan Diagram Book gives length over buffers as 24' 10" and wheelbase as 5' 6" + 5' 6".  Has the kit come out to these dimensions, broadly?

Just a footnote on the Jazz service. 

I'll leave it to others to debate the exact source of the term 'Jazz' in this context.  I can add, however, that 'jazzing' is a term used by railway schedulers for the design of an intensive service from one terminus to multiple destinations, often alternated in pattern.  It's very feasible this may have started as a result of the best practice established by the GER.  

Others have responded to my observation with derision but I believe that scheduling at its best, across the logistics and transport industry has always achieved its excellence through acknowledging not only innovation but also tradition and deep experience and operational practicality.  

There is a good Railway Gazette article, October 1920, on the GER's intensive services.