My third model was also a Santa Fe depot. The first wood frame depot in Newton Kansas from 1871.
I used the drawings and construction article from Lloyd Giebner that was published in a 1956 Modelrailroader magazine. Back then all structures were build from cardboard or strip wood. I used Evergreen styrene again.
Construction was very straight forward. The walls and roof are build from styrene and for the freight platforms I used wood strips
Unfortunately I did not include an interior, and guess what ? again it only took 77 points in judging.
I reworked the interior and added acouple of signs and figures
A year later the judges rewarded my additional efforts and kicked it to 88 points
It is always worth reworking a model and by doing so, you usually get the needed 87.5 or 88 points. But it sometimes also shows that many details are hard to add later. Its better to plan them in right from the beginning. The score shows the defficiencies. You cannot change much to the score in construction, because the main structure cannot be altered later. When building from a prototype it is easier to provide good documentation, and getting a good score in conformity. The same counts for the finish, if you take prototype pictures and try to get as close as possible with the paint and weathering.