I have been teaching myself blender, I did add the details onto the walls separately then exported a STL, I did not even consider it would not export as one object. I will look at some tutorials and fix and re-upload it. Thank you for the info!
I think Vase Mode would make it fit a little loose. I tried to make the window sheath 2 layers thick if you are using a .4 nozzle. I thought 2 layers diffused the light well and had decent rigidity.