Joey, thanks for the resources as there are so many broken links out there.
I'm having the same issue; however, I'm finding very little success flashing with Odin to return back to stock.
Following the same steps you've outlined above, I receive a the following from Odin:
and the following from the prompt on the S4 screen:
I've tried multiple prescribed methods, including the one you outlined, using Kies, and using nkhater's method for Unbricking I337 posted here.
I'm not entirely sure what steps to take next but any thoughts would be greatly appreciated.