Worked with no problems!
Flashed all 4 files using Odin 3.07 over stock, unrooted, NC9 OTA , which in turn I had flashed over stock, unrooted, ML2 through stock recovery. I had used the same Odin 3.07 to flash ML2 over MF3 (which came with the phone).
I had rooted the MF3 and installed Safestrap on it at some point. Once I decided a couple of days ago to try to upgrade all the way to NE3, I uninstalled Safestrap, all other programs I had installed and unrooted with SuperSu and did a factory reset in preparation for the ML2 flash with Odin (the phone still said custom when it booted after that, but once I flashed the ML2 Odin files, the phone was back to the stock boot animation).
I actually was stuck on the stock, unrooted, NC9 yesterday because after trying to flash the NE3 OTA through the stock recovery, the OTA seemed to be applied, but upon reboot the phone was still at NC9? And today, the solution! Thanks to all involved!:good:
By the way, I checked my knox counter when I entered Download (Odin) Mode before I flashed NE3 and it was at 0x0, so it seems that neither rooting nor installing Safestrap on MF3 changed the knox counter to 0x1
Next step, root with Towelroot, see how that goes (Thank you Geohot!):good: