Thanks for your reply ! At least it's something.
About the cases add-ons, could you please give me a link to the store you mention ? Thanks.
About the chassis version, I guess I'll order the standard version then I'll purchase the Riing PLUS fans separately.
About the fans, I'm not an expert. I just guessed I would need a fan type for intake and a different fan type for outtake. I won't have other fans : 1 or 2 intake, 1 outtake.
About the Tt website, yes, it's a shame, unfortunately.