I could be wrong, but I believe only mods can move threads. Never tried, and don't see anything obvious.. Ah well, no big deal.
I wonder if these devices use something different than nv_data.bin? I mean, we both seem to get working LTE service without it, right? Other various posts found via gooogle show several folks that claim their corruption and/or lack of nv_data.bin results in no service.
I highly doubt a factory reset will do any damage, "factory reset" basically means wiping data and cache, which is quite safe. Factory reset doesn't touch /system, /boot, etc. The assumption is that the user never had access to modify /system, so wiping the cache and user data partitions results in a "factory fresh" condition.
No so much after you've haxxored up all sorts of stuff.
If you are looking to get back to as close to stock as possible, you are probably best off starting with the factory ODIN tarball, which I believe is still available on sammobile. It contains the boot, system, recovery, cache and two modem partitions (although it doesn't appear to contain an EFS image).
It would be interesting to see if a virgin device actually has this file. My suspicious is we are both missing this file because it never existed on the i957 in the first place. I believe another vector would be used to unlock the device, instead of the nv_data hack.
Futhermore, I believe the nv in nv_data means nvidia, who makes the Tegra chipset and associated radio modems which are used in devices based on Tegra. The i957 is based on the MSM8660 SOC, a Qualcomm part, which is an entirely different beast than the Tegra solution. Pretty much everything I can find online about hacking up nv_data.bin covers devices that are NOT based on Qualcomm SOCs, which in recent times is most devices not destined for LTE on AT&T or other similar carriers (Rogers/Bell/Telus).