I didn't see anyone respond, but I'd love to know the answer to this as well. When installing the ROM, I had to select a CSC regardless (BTU I believe), so I'm pretty sure I can go through and install my needed CSC.
About having to flash a different csc (tzo?) before booting, then flashing the tmo csc...
What this tells me is that some initial setup on the first boot of the rom, that has to do with csc, is critical, such that flashing a new csc later on will not alter that initial setup. That's a bit disconcerting that flashing a new csc will not completely undo changes made by a previous csc. So just flashing a csc whenever is not a great way to properly modify. The right way is to apply the right csc before first boot, and never change it.
It's either that or the instructions to install the Brazilian (tzo) csc before first boot are not actually needed at all.
What's troubling about reading a bunch of people, of dubious competence, on forums, giving out instructions to modify their devices, is that they might actually be causing more problems than they are fixing. Xda is the WildWest. I have zero reboot issues with the latest SM rom and superstock kernel, but a lot of people just dirty flash over and over and then blame the developers for their system being unstable and rebooting. I don't want to take advice from those guys--not without first asking, "tell me why!?"
The others.xml file from the tmb csc looks like it was hacked up by someone trying ideas they collected from multiple sources.
I really hope we can get a clean tmb csc for oreo.
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