Main hall, view #2

I figured out why Sketchup was overwriting previously uploaded files. It appears that the 3Dwarehouse assigns a file # to each upload that is saved in association with your original file on your computer. It does this so that when you modify or update the file on your computer and upload it again 3Dwarehouse simply updates the original on the server rather than having a host of the same files stored, each with some minor changes. Good for 3DWarehouse, but bad if you accidentally overwrite a file you needed. The fix (in case anyone else has this trouble) in Sketchup is to go to:

EDIT > Select All,
EDIT > Copy,
go to
FILE > New, and when the empty workspace appears,
EDIT > Paste.

You've basically copied everything in the old file and pasted it into a new file that 3Dwarehouse hasn't seen yet. You can then FILE > Save As and overwrite the same file you've been trying to save it as. Upload, and you're good to go!

On that note, I've fixed the links on this site to match the proper models on 3Dwarehouse, and added this model which shows the inside of the main hall again except looking the other way. You can click on the picture and it will take you to the 3Dwarehouse model. Again, this is only a chopped up section of the overall model just arranged and finished to provide a visualization what the real thing might look like.