🚀 go-pugleaf

I believe the process you have outlined is more or less what Word
does when you Save a file ordinarily. It creates a temp file to 
save it to, deletes the old file, and renames the temp file to 
the document name. The advantage being if the power should fail, you
would at least have the pre-saved version.
You can verify this by saving an open document on a diskette with
less memory than the size of the file. Word will refuse.
The only danger seems to be the "Fast Save" option, which doesn't
safeguard the file as well.
Greg Herlihy