EDIT: Solved/Answer received. I really do apologize if this has been asked before but I have not seen this asked yet in the months I've been lurking here. This idea came into my head from the iOS 9.0.2 jailbreak on iDevices. So you know how the 3DS can pre-download a firmware update, leave it in the memory, and then apply it at any time? What if there was a homebrew application that could mimic this function. Let's say the latest version was 10.9. I am currently on 10.1. Let's just say there is an amazing, specific exploit only on 10.2 but obviously since 10.9 is the latest homebrew, you would end up skipping the firmware upgrade. A homebrew app will read update files on the SD card and move them into a specific place in the memory and trigger the built-in updater/special homebrew updater and apply the 10.2 files instead of 10.9. In another sense, what if the 3DS already knows the files for 10.9 or there, and we overwrite them with 10.2 when it still thinks it is going to update to 10.9? I know nothing about how anything works on the kernel or what we can currently access, so I apologize if the answer to my question is blatantly obvious. I realize that if it were this easy, then something may already have been released by now or possibly the same with downgrading, but I'd like to know what currently stands in the way.