I'm going the b9s / luma route at the moment and kind of starting fresh. When I got this 3DS in 2015 I got Gateway 3DS and what I would do with the rom files is change, I think, the header file from what was on the rom to a legit header from one of my own cartridges that have an online mode. Is this still necessary? What steps do I need to do to be safe online especially if I use a .cia game? And US games on Eu 3DS if important. Thanks!