This is one of a set of buildings I got from Burn-In Designs two years ago, slowly put together and painted as time went on. They sat with just a single coat until I found a window set up that I liked from a FB group. Another coat, the window backing and then painted the trim. The tower on top of the larger part is NOT glued in, it can be removed if needed and slots in firmly. It can be its own building and has for a game or two. I am working on building a helipad that I can drop into the opening using a few other bits of wood to give it a good seat like the tower. I will probably have to make some sort of roof access, which should look like what is on top of MOE's on the other topic.
I am thinking about adding on a drainspout on corners to help hide where they are joined. The building will eventually sit on a set of hexes with tabs to keep it firmly in the same place and I will do some landscaping with flock and clump foilage.