RBBB 149
 
Mt Vernon flatcar (RBB&B 149).  The model consists of a 3D-printed body on an Micro-Trains circus flatcar underframe decorated with Circus City decals, riding on Atlas Barber S2A trucks and ESM metal wheels. 

Commissary wagon #104 is a 3D-printed model, with the overall 1:24 scale body downloaded from the Thingiverse website and reduced to N scale. The wheels are 3D-printed and the footrest is a Micro-Trains plastic detail part. 

The three cage trailers are stock Micro-Trains models.