Hello, As to the above pictures and post regarding window dimensions I noted this also and have found this also to be very obvious in several British locomotive addons ( Dimensions typically too large/ deep leaving the bodywork/ negative space between the glazing rather too small). When referring to period images it becomes very apparent.
It is an unfortunate distraction as otherwise I like this locomotive and Cesar Pachs other UP models very much. I particularly like the Booster unit....it would be good to see more B units modelled in time. The UP armor yellow on this model is actually very nice I think....although colour can be subjective. However, if theres anyway the window dimension can be corrected this very nice model would become even better.
Thanks to Cesar Pach for his interesting models and continued work.