BIG note: Don't use a USB 3.0 port on your PC. At least for me, this was the killer for re-applying the CF Auto Root after following the above instructions. Flashing the NB3 recovery worked in Odin 3.07 and 3.09 just fine. Every time I tried to re-apply CF Auto Root, it hung on cache.img like so many others.
Like I'm supposed to do, I scoured the posts and general internet so I wouldn't ask a question that's been answered many times. What caught my eye was the repeated note to open Odin and load the file to be flashed in Download mode FIRST, then connect the USB cable. One post said to do this and wait for the Download mode drivers to load. This got me thinking that the device needed different drivers for different connection modes. If USB Debugging, MTP, PTP... were different, why wouldn't USB 2 or USB 3 also be different???? I was always in USB 3 out of habit and decided to try a USB 2 port on my PC (bingo).
1. Updated to NC5 using Kies using USB 3. Worked without issue. OTA wouldn't work b/c I was rooted already.
2. Flashed the NB3 recovery (PDA slot) as noted above in USB 3 using Odin 3.07. Worked without issue.
3. DON'T DO THIS - Flashed CF Auto Root recovery using USB 3 (PDA slot). This is where my problems started and the device was in what I think is called a soft brick.
Intermission to scour the internet and try different solutions
4. Disconnected USB cable.
5. Get into Odin 3.07, load NB3 recovery file (PDA slot)
6. Connect USB cable to USB 2.0 port (directly to mobo port, not a USB hub just in case)
7. Flash NB3 recovery. No problems
8. Disconnect USB cable from Note (still in 2.0 port on PC)
9. Reboot into Android NC5. No problems (Exchange account was gone - no big deal)
10. Connect USB cable and let the PC recognize the device. I switched between MTP and PTP to make sure both drivers were registered and it did register twice proving that these are different connection types (kind of a 'duh yeah' thing)
11. Disconnect USB cable from Note, shut down and boot into Download mode.
12. Get into Odin 3.07, load CF Auto Root recovery into PDA slot.
13. Connect USB cable to Note.
14. Start (flash). BINGO!!!!
15. Disconnect USB cable, reboot
16. Boot into Android NC5.
17. Download SuperSU and open it. Rooted again!
Are all these steps needed, maybe not. But for me, the key was to not use USB 3.0 connection on the motherboard. The cable was USB 3.
For all the times someone else posted a really thorough post that saved me time, thank you!!! This one's for all you awesome folks out there who help out.