Thanks!1) just know about 2.6.x of twrp, working fine. 2.7.x seems still to be in dev period
2) first flash 4.4.2 (containing bootloader update afaik) and root after
3) seems to be possible with odin but where is no reason to do that. Stock rooted 4.4.2 is wonderful, just better with root, xposed, and apps tuned to be multiwindow compatible
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1) Have been wary of using the latest versions in the past until well tested...don't want issues with restoring nandroids, etc - will go with 2.6.x for now.
2) Just to be 100% clear, when you say flash you mean take the OTA then root. I may be mistaken, but OTA's aren't incremental are they? It should just be the latest & greatest...so don't have to update, wait for the next "push", etc.
3) I guess my main concern was with earlier external sd card issues, but by now would think most major apps have been written to work with kitkat... Also like having an "escape hatch" just in case, lol!
Again thanks for the reassurance