To answer my own questions:Hi,
I'm running N9005XXUGNG1 (Kitkat) rooted using _alexndr's method described here.
CSC: N9005VFGGNH1 (UK Vodafone)
I have installed Xposed framework and Wanam exposed, and Viper4Android FX, but other than that have done minimal customisation.
Knox is 0x0
Can I upgrade straight to POK2 using the method described in post 1?
Do I need to factory reset first? If I do, does this remove root?
Post 1 makes reference to upgrading to the newest stock firmware first to get CSC updates but I can't figure out how to do that and keep root.
Any assistance will be much appreciated!
Can I upgrade straight to POK2: yes. Although I opted to do a Restore Factory Defaults (from the phone menu, not recovery) beforehand
Do I need to factory reset first? Dunno, I decided best to. Does this remove root? No, but it does remove SuperSU, just reinstall it from Play Store
Regarding upgrading to newest stock firmware first to get CSC updates - I didn't do this. Everything seems to be fine.
I flashed using Flashfire.
I then installed the BL and CP files using Odin 3.09